Editing Professor E. Gadd

{{character infobox
|image=[[File:LM2HD E. Gadd Artwork.png|200px]]<br>Artwork from ''[[Luigi's Mansion 2 HD]]''
|full_name=Professor Elvin Gadd
|species=Human
|first_appearance=''[[Luigi's Mansion]]'' ([[List of games by date#2001|2001]])
|latest_appearance=''[[Luigi's Mansion 2 HD]]'' ([[List of games by date#2024|2024]])
|latest_portrayal=[[Kazumi Totaka]] ([[List of games by date#2001|2001]]–present)
}}
{{quote|Ooof... I sure take a lot of knocks in this line of work. I'm getting too old for this ghost-catching tomfoolery. Anyway, nice to meet [[Luigi|you]]. I'm Professor E. Gadd.|Professor E. Gadd|Luigi's Mansion}}
'''Professor E. Gadd''', also known by his full name '''Professor Elvin Gadd''' or simply '''E. Gadd''', is an elderly scientist who debuted in ''[[Luigi's Mansion]]'' and is the founder of [[Gadd Science, Incorporated]]. He is a researcher of [[Ghost (Luigi's Mansion series)|ghosts]] and is responsible for a variety of inventions, most notably the [[Poltergust]] series of vacuums. He makes ambiguous gibberish sounds when speaking (supplied by [[Kazumi Totaka]], who took inspiration from ''[[:Category:Animal Crossing series|Animal Crossing]]''{{'}}s "[[nookipedia:Animalese|Animalese]]" when inventing the voice<ref>{{cite|author=JC, Anthony|date=September 2001|deadlink=y|archive=web.archive.org/web/20071014103505/http://www.n-sider.com/articleview.php?articleid=414|title=The Making of the Game - Luigi's Mansion|publisher=n-sider.com (translation from ''Nintendo Online Magazine'')|accessdate=August 28, 2020}}</ref>), and he frequently uses phrases such as "criminy," "hullabaloo," etc. His name comes from the exclamation "egad," a {{wp|minced oath}} for the archaic expletive "ye gods."
==History==
===Background===
[[Elvin Gadd (past)|In his past]], E. Gadd lived on the foothills of the [[Thwomp Volcano]], as depicted in ''[[Mario & Luigi: Partners in Time]]''. The Mario Bros. go back in time and end up saving his lab from burning down when fire blocks erupted from the Thwomp Volcano. He then helps the Mario Bros. by inspiring his older present self to create the [[Hydrogush 4000]]; as the Mario Bros. are in the present, he starts to get the idea for the device, which transfers to his future self. The present-day Professor E. Gadd uses the Hydrogush 4000 to send water through via [[time hole]] and calm the erupting Thwomp Volcano. Afterwards, E. Gadd moves to the [[Boo Woods]] when he was around twenty-years-old, where he would later study ghosts.<ref>{{cite|quote=I've been living here since I was a lad of twenty or so [...]|author=Professor E. Gadd|title=''[[Luigi's Mansion]]''|date=2001}}</ref> In order to get funding for his ghost research, E. Gadd also started a cafe franchise called [[Starbeans Cafe]].<ref>{{cite|quote=Ah, but as with all things, conducting research requires a fat stack of coins. So I decided to manage the Starbeans Cafe as a secondary source of income!|author=Professor E. Gadd|title=''[[Minion Quest: The Search for Bowser]]''|date=2017}}</ref>

===''Luigi's Mansion'' series===
====''Luigi's Mansion'' / ''Luigi's Mansion (Nintendo 3DS)''====
[[File:Professor Elvin Gadd.jpg|thumb|Professor E. Gadd with the original design for the Poltergust 3000 in ''Luigi's Mansion''.]]
Professor E. Gadd is a supporting character in ''Luigi's Mansion'' and [[Luigi's Mansion (Nintendo 3DS)|its remake]]. He is first seen saving Luigi from a [[Gold Ghost]] using his invention, the [[Poltergust 3000]]. The professor researches ghosts in the lab nearby. Upon learning of [[Mario]]'s whereabouts, E. Gadd gives Luigi both the Poltergust 3000 as well as the [[Game Boy Horror]] for communication. E. Gadd continues to help Luigi for the remainder of the journey.

====''Luigi's Mansion: Dark Moon'' / ''Luigi's Mansion 2 HD''====
[[File:LMDM EGadd Luigi.png|thumb|left|E. Gadd with [[Luigi]] in ''Luigi's Mansion: Dark Moon''.]]
Professor E. Gadd returns in ''[[Luigi's Mansion: Dark Moon]]''. He lives in his [[Lab|Bunker]] at [[Evershade Valley]], where the ghosts are friendly from the pacifying effects of the [[Dark Moon]]. He and the ghosts work at a lab in [[Gloomy Manor]], where E. Gadd conducts his studies, in addition to his [[Toad (species)|Toad assistants]] at the mansions nearby. When King Boo (who had escaped from his portrait sold by E. Gadd) destroys the Dark Moon, the ghosts become villains and start causing destruction. E. Gadd enlists the help of Luigi to restore the Dark Moon. He gives Luigi the upgraded [[Poltergust 5000]], which comes with an upgraded flashlight named the [[Strobulb]]. E. Gadd also invented the [[Pixelator]], which converts Luigi into pixels as he travels between locations; the [[Dual Scream]], replacing the Game Boy Horror; and the [[Dark-Light Device]], which reveals invisible objects.
{{br}}

====''Luigi's Mansion Arcade''====
E. Gadd has a similar role in ''[[Luigi's Mansion Arcade]]'', communicating to Luigi as he travels through the mansions. E. Gadd also offers a tutorial to the player upon starting the game.

====''Luigi's Mansion 3''====
[[File:E Gadd with Poltergust LM3 art.png|thumb|Professor E. Gadd in ''Luigi's Mansion 3'' with the [[Poltergust G-00]]]]
E. Gadd returns in ''[[Luigi's Mansion 3]]''. E. Gadd is trapped into a painting at [[The Last Resort]], after being tricked by the owner [[Hellen Gravely]], who also freed King Boo again. He is later saved by Luigi, who comes equipped with the [[Poltergust G-00]]. E. Gadd wanted to leave the location at first, but since Luigi wants to also rescue his friends, E. Gadd assists him throughout the journey from his portable [[lab]], where he provides the [[Virtual Boo]] for communication purposes as well as [[Gooigi]] later on. Before Luigi's final battle with King Boo, E. Gadd is trapped in a group painting with Mario and the Toads, though [[Polterpup]] saves Luigi from being caught in the painting too. In the ending, after King Boo is defeated and Luigi's friends are rescued, E. Gadd has the idea to rebuild the Last Resort complex and gives Luigi and the ghosts hard-hats as they proceed to rebuild it. All of the characters later leave the Last Resort except E. Gadd.

While E. Gadd is following Luigi, one of the poses he strikes if flashed by the Strobulb references {{wp|Marilyn Monroe}}'s famous "white dress scene" in ''{{wp|The Seven Year Itch}}''. The back of his lab coat even flutters upward during the pose.

===''Super Mario'' series===
====''Super Mario Sunshine''====
Professor E. Gadd is alluded to by [[Bowser Jr.]] in ''[[Super Mario Sunshine]]'' when he says he got his [[magic brush]] from "a strange old man in a white coat." E. Gadd company has a company named Gadd Science, Inc., which has a logo showing a face and hairstyle resembling E. Gadd's, appearing on the magic brush, FLUDD, and even [[nozzle box]]es.

====''Super Mario Maker''====
E. Gadd is one of the [[Mystery Mushroom]] [[Costume Mario|costume]]s in ''[[Super Mario Maker]]''. It is unlocked by completing the [[Event Course]] [[Paranormal Research]].

===''Mario & Luigi'' series===
====''Mario & Luigi: Superstar Saga'' / ''Mario & Luigi: Superstar Saga + Bowser's Minions''====
[[File:MLSS-E Gadd Ghost.png|frame|Professor E. Gadd sucking up a ghost in ''[[Mario & Luigi: Superstar Saga]]''.]]
E. Gadd is the owner of [[Starbeans Cafe]] at [[Beanbean Castle Town]] in ''[[Mario & Luigi: Superstar Saga]]''. He tries the brewed coffee produced by Mario and Luigi and rewards [[Starbeans Cafe#Special Items|Special Items]]. E. Gadd would have [[List of Mario & Luigi: Superstar Saga pre-release and unused content|originally]] appeared only for the [[Woohoo Blend]], and other Nintendo protagonists such as [[Link]] or [[Samus]] would have appeared for different blends.

In ''[[Minion Quest: The Search for Bowser]]'', E. Gadd is found a cave by [[Bowser's Minions]]. E. Gadd claims that he followed ghosts when he fell in before talking about his research as well as mentioning that he is working on a time-travel device, a nod to [[Mario & Luigi: Partners in Time|the original main story's sequel]]. It is also revealed that E. Gadd founded Starbeans Cafe to get money toward his ghost research.
;Reactions to the drinks
The professor has many different reactions for each time a new drink is made at Starbeans Cafe, usually accompanied with a humorous scene.
*The first reaction gives a reference to ''[[Luigi's Mansion]]'' when the new brew attracts a [[Gold Ghost]], which scares Luigi, but the professor comes in with the [[Poltergust 3000]] and sucks it up. The professor explains that he owns the Cafe, and that each time he samples a new brew, he will give a gift to the Bros. He samples the brew and gifts to them the [[Greed Wallet]].
*The second reaction has the professor drawn in by the smell of the drink, and samples a flavor. He then gives the Bros. the [[Bonus Ring]]. The professor then has a major reaction to the very "Strong Brew" and asks the bartender where the bathroom is. The bartender replies that he had never built one. Luigi then rushes to get the Poltergust 3000 and sucks the professor in.
*The third reaction has him on a Poltergust 3001, a rocket. He samples the drink and gives the [[Excite Spring]] before blasting away.
*The fourth has him on a giant Game Boy Horror. He sends a [[Speedy Spirit]] as a representative for the sampling, much to Luigi's terror. After that, the ghost drops the [[Great Force]].
*In the fifth reaction, he has the giant Game Boy Horror send the drink to him. He then gifts them the [[Power Grip]] in the original or [[Secret Specs]] in the remake. He promises to come in person the next time a new brew is made.
*In the sixth reaction, E. Gadd comes wearing a suit that makes him a ghost. He samples the drink and gives the [[Cobalt Necktie]]. A terrified Luigi uses the Poltergust 3000 to suck the professor inside.
*In the final one, he samples the last drink and proclaims it the best one, much to his employee's annoyance. He gives the Bros. the [[Game Boy Horror SP]]. Before leaving, he hangs a photo of himself in the shop as a way to brighten one's spirits, which the employee labels dumb.
{{br}}

====''Mario & Luigi: Partners in Time''====
{{see also|Elvin Gadd (past)}}
[[File:Professor Elvin Gadd PiT.png|left|thumb|200px|Professor E. Gadd appearing in ''Mario & Luigi: Partners in Time''.]]
E. Gadd has a much larger role in ''[[Mario & Luigi: Partners in Time]]''. He introduces his newest invention to the [[Mushroom Kingdom]], a [[Prof. E. Gadd's time machine|time machine]] in [[Peach's Castle]]. Some time after Mario and Luigi defeat the [[Junior Shrooboid]], E. Gadd proceeds to study it, which he does for most of the Mario Bros.' journey.
[[File:Egadd.gif|frame]]
E. Gadd later explains to Mario and Luigi that hole in the courtyard is a [[time hole]], produced by a time machine. After the Mario Bros. enter the time hole, beginning by accident from Luigi, E. Gadd sends a living suitcase named [[Stuffwell]] to assist them.
[[File:YoungEgadd.png|thumb]]
At [[Thwomp Volcano]], Mario, Luigi, and their baby counterparts come across and paradoxically meet a [[Elvin Gadd (past)|younger Professor Gadd]], who is studying [[Thwomp]]s. During this time, though, the volcano erupts, with several Thwomps falling in and destroying the laboratory. One threatens to explode, and must be put out; Baby Mario and Baby Luigi do this by having Baby Mario drink water and Baby Luigi hammering him to spit it at the Thwomp, dousing it. Witnessing this event in the past causes the present day E. Gadd's memories to be rearranged and inspires him to invent the [[Hydrogush 4000]], a massive water pump. Mario and Luigi then have him pump water through the time hole leading to Thwomp Volcano to douse the mountain. After his lab is destroyed by the eruption of the volcano, young E. Gadd mentions his interests in studying ghosts, and that he would be buying a lab at the edge of the Boo Woods, alluding to ''Luigi's Mansion''.

It is later revealed that the [[Shroob]]s are vulnerable to tears, and after learning this from Mario, Luigi, and Peach, E. Gadd sends liquid from the Hydrogush 4000 into various time holes to destroy the Shroobs and revert any Shroobified characters to their original form. E. Gadd also uses the time machine to take the characters into the future.

===''Mario Party'' series===
[[File:MPA ProfessorElvinGadd.jpg|thumb|Professor E. Gadd as seen in ''Mario Party Advance''.]]
E. Gadd has many inventions in the [[Mario Party (series)|''Mario Party'' series]]. The first is supposedly the [[Gaddlight]] from ''[[Mario Party 4]]'', but this only occurs for his localized English name. Many of the vehicle parts in [[Super Duel Mode]] of ''[[Mario Party 5]]'' are his invention. The [[Gaddget]]s throughout ''[[Mario Party Advance]]'' are also made by E. Gadd. The [[Magic Orb|magic wand]] and [[Vacuum Orb]] also bear his symbol in ''[[Mario Party 7]]''.

E. Gadd is only a non-playable character in ''[[Mario Party 6]]'', hosting [[E. Gadd's Garage]] and allowing the player who landed on a [[Event Space|? space]] to use one of his inventions, as well as ''[[Mario Party Advance]]'', co-hosting Play Land.

===''Mario Kart'' series===
''[[Mario Kart Arcade GP]]'' and ''[[Mario Kart Arcade GP 2]]'' feature a statue of E. Gadd in the background of the [[Diamond City (arcade)|Diamond City]] course, as well as the Gadd Science logo on a building. [[Robo Mario]] similarly has E. Gadd's symbol.

===''Super Smash Bros.'' series===
E. Gadd is mentioned in the Vacuum Luigi [[Trophy (Super Smash Bros. series)|trophy]] in ''[[Super Smash Bros. Melee]]'', the trophies for [[F.L.U.D.D.]] and the [[Poltergust 3000]] in ''[[Super Smash Bros. Brawl]]'', the trophy representing the various [[ghost (Luigi's Mansion series)|ghosts]] that appeared in ''Dark Moon'' in ''[[Super Smash Bros. for Nintendo 3DS]]'', and Luigi's [[Final Smash]] trophy, the [[Poltergust 5000]], in ''[[Super Smash Bros. for Wii U]]''. "EGADD" is also a possible random name that a player can give their custom stage in ''Super Smash Bros. Brawl'' as well as ''[[Super Smash Bros. Ultimate]]'' in general.

E. Gadd is featured in the form of collectible items in two games, being a trophy in ''Super Smash Bros. for Nintendo 3DS'' and a [[Spirit (Super Smash Bros. Ultimate)|spirit]] in ''Super Smash Bros. Ultimate''.

===Unused appearances===
====''Mario Kart DS''====
There is evidence in the [[List of Mario Kart DS pre-release and unused content#Characters|US demo prototype version]] of ''[[Mario Kart DS]]'' that E. Gadd was going to be playable, which would have been his first playable appearance, but he was replaced with [[Dry Bones]] in the final version.

==General information==
{{stub|section=yes|Include a General info section on personality.}}
===Appearance===
[[File:Egadd.png|thumb|200px|left|Professor E. Gadd in ''Luigi's Mansion'']]
Professor E. Gadd is a small, elderly man. He wears brown shoes and a white lab coat with a red shirt underneath. He has a large head wider than his body, with a pink nose, a mouth with a singular tooth, large glasses with circles in them, and a tall but thin amount of white hair on his head. He has small dotted eyes, which are normally obscured by his glasses, but can be seen in some games if viewed at certain angles.<ref>{{cite|author=Shesez|date=July 14, 2019|url=youtu.be/7E-9moqWXRk?t=133|title=Top 10 Hidden Faces in Video Games... Revealed!|timestamp=02:13|publisher=YouTube|accessdate=November 3, 2019}}</ref> Glasses with swirls that are often seen in Japanese media are a feature E. Gadd shares with [[Mad Scienstein]], [[Professor Frankly]], [[Fawful]], [[Francis]], and [[Iggy|Iggy Koopa]]. In ''[[zeldawiki:The Legend of Zelda: The Wind Waker|The Legend of Zelda: The Wind Waker]]'', there is a character named [[zeldawiki:Mako|Mako]] whose face resembles E. Gadd's.

In ''Mario & Luigi: Superstar Saga'' and its remake, he can also wear a large blue coat.
{{br}}

===Inventions===
{{image|more=yes|Upload proper images of the Boo Canister and Ghost Container; needs an image of the full E. Gadd Battle Machine.}}
<gallery>
No image.png|[[E. Gadd's Vault#Boo Canister|Boo Canister]]
DS Time Radar.PNG|[[DS time radar]]
Dualscream1.PNG|[[Dual Scream]]
File:Egadd body.png|[[Super Duel Mode|E. Gadd Body]]
File:Egadd jet.png|[[Super Duel Mode|E. Gadd Jet]]
File:Egadd engine.png|[[Super Duel Mode|E. Gadd Engine]]
File:Egadd cannon.png|[[Super Duel Mode|E. Gadd Cannon]]
No image.png|[[Super Duel Mode|E. Gadd Battle Machine]] (all parts put together)
GGday.jpg|[[E. Gadd's Garage]]
CrossroadsLMDM.png|[[E-Gate]]
FLUDD SMS.png|[[F.L.U.D.D.]]
MPA Gaddget Menu Screenshot.png|[[Gaddget]]s
Gaddlight.jpg|[[Gaddlight]]
LM Art Game Boy Horror.png|[[Game Boy Horror]]
SpI GameBoyHorrorSP MLSS+BM.png|[[Game Boy Horror SP]]
LMDM Greenie Vault.png|[[E. Gadd's Vault#Ghost Container|Ghost Container]]
Ghost Portrificationizer LM.png|[[Ghost Portrificationizer]]
LM3GooigiArt2.png|[[Gooigi]]
GoshiGoshi clean 1.png|[[Goshigoshi Beat Brush]]
Ghost suit.PNG|[[Gown]]
VaultLMDM.png|[[E. Gadd's Vault]]
LM3ElevatorTracker.png|[[Elevator tracker]]
Hydrogush4000.PNG|[[Hydrogush 4000]]
Magic Orb.png|[[Magic Orb]]
Bowser Jr Artwork Super Mario Sunshine.png|[[Magic brush]]
MP6 LabBrats.jpg|[[Lab Brats|Maze Manufactory]]
No image.png|[[List of implied items#Parascope|Parascope]]
Pixelator 1.png|[[Pixelator]]
No image.png|[[PolterCue|PolterGust1000]]
LM Poltergust 3000 model.png|[[Poltergust 3000]]
Poltergust 3001.PNG|[[Super Poltergust 3001]]
MKT Icon Poltergust4000.png|[[Poltergust 4000]]
Poltergust 5000 (alt) - Luigi's Mansion Dark Moon.png|[[Poltergust 5000]]
LM3 Poltergust G-00 artwork.png|[[Poltergust G-00]]
RoboMarioScreen.png|[[Robo Mario]]
MLSS Starbeans Cafe Menu.png|[[Starbeans Cafe]]
Stuffwell.jpg|[[Stuffwell]]
Egadd time machine.png|[[Prof. E. Gadd's time machine|Time Machine]]
Vacuum Orb.jpg|[[Vacuum Orb]]
Virtual Boo.jpg|[[Virtual Boo]]
</gallery>

==Profiles and statistics==
===''Mario & Luigi: Partners in Time''===
*'''Guide bio:''' "''The Mushroom Kingdom's resident mad scientist, Professor E. Gadd, is responsible for creating the time machine. The professor will aid Mario and Luigi by offering advice and guiding the brothers to their next objective. He talks like an Ewok.''"<ref>{{cite|author=Hoffman, Chris|title=''Mario & Luigi: Partners in Time Nintendo Player's Guide''|page=3|date=November 18, 2005|publisher=Nintendo of America|language=en-us|isbn=1598120069}}</ref>

===''Luigi's Mansion'' series===
====''Luigi's Mansion: Dark Moon''====
*'''North American website bio:''' "''Known for his paranormal research and plethora of wild inventions, Professor E. Gadd just needs someone crazy enough to put them to the test.''"<br>
*'''European website bio:''' "''An eccentric scientist who invented the Poltergust 5000, a big improvement on the previous 3000 model. After the ghosts turn hostile and take over mansions, he calls on his old friend Luigi to help out.''"

====''Luigi's Mansion 3''====
*'''In-game bio:''' "''A genius inventor and the leading authority in the field of ghost research. His beloved ghost collection is said to be the best in all the world! He supports Luigi in his adventures...from the safety of his Lab, that is!''"

===''Super Smash Bros.'' series===
====''Super Smash Bros. for Nintendo 3DS''====
{{SSB4 trophy
|name=Professor Elvin Gad{{sic}}
|altname=Professor E. Gadd
|image=[[File:ElvinGaddTrophy3DS.png|100px]]
|category=Series Related
|unlock=Random
|desc=The ghosts of Evershade Valley have gone wild under the shadow of the shattered Dark Moon, so Professor E. Gadd of Gadd Science, Inc., asks Luigi to gather the moon's scattered pieces. I say "asks," but Professor Gadd has never really given Luigi a choice...
|desc2=The Dark Moon in the sky above Evershade Valley has shattered! With all the ghosts going on the rampage, Professor E. Gadd, the leading authority on ghost research, calls in a quivering Luigi to sort out the mess. The professor never was one to give him much of a choice...
}}

====''Super Smash Bros. Ultimate'' spirit====
{{spirit
|no=120
|name=Professor E. Gadd
|image=[[File:Professor Elvin Gadd Artwork - Luigi's Mansion Dark Moon.png|x100px]]
|series=''[[Luigi's Mansion (series)|Luigi's Mansion]]'' Series
|type=Support
|slots=2
|class=Advanced
|effects=Energy Shot Attack/Resistance ↑
|obtain=Summoned with a Poltergust 5000 and F.L.U.D.D. core
}}

===[[Play Nintendo]]===
*'''''A genius inventor who supports Luigi in his adventures…from the safety of his lab, that is.'''<br>Professor E. Gadd is the leading authority in the field of paranormal research. His beloved ghost collection is said to be the best in the world!<br>This eccentric ghost expert is known for many brilliant inventions, including the Poltergust line of ghost-hunting tools and Luigi’s gooey doppelganger, Gooigi.''<ref>{{cite|date=2024|url=play.nintendo.com/themes/friends/professor-e-gadd/|title=Play Nintendo|accessdate=September 3, 2024}}</ref>

==List of appearances by date==
{|class="wikitable sortable" width=100%
|-
!width=40%|Title
!width=20%|Description
!width=20%|Release
!width=20%|System/format
|-
|''[[Luigi's Mansion]]''
|Non-playable character
|Japan:<br>September 14, [[List of games by date#2001|2001]]
|[[Nintendo GameCube]]
|-
|''[[Mario Party 4]]''
|Cameo as item (Gaddlight)
|North America:<br>October 21, [[List of games by date#2002|2002]]
|Nintendo GameCube
|-
|''[[Mario Party 5]]''
|Cameo as vehicle parts
|North America:<br>November 10, [[List of games by date#2003|2003]]
|Nintendo GameCube
|-
|''[[Mario & Luigi: Superstar Saga]]''
|Non-playable character
|North America:<br>November 17, [[List of games by date#2003|2003]]
|[[Game Boy Advance]]
|-
|''[[Mario Party 6]]''
|Non-playable character
|Japan:<br>November 18, [[List of games by date#2004|2004]]
|Nintendo GameCube
|-
|''[[Mario Party Advance]]''
|Non-playable character
|Japan:<br>January 13, [[List of games by date#2005|2005]] 
|Game Boy Advance
|-
|''[[Mario Kart Arcade GP]]''
|Cameo as background
|North America:<br>[[List of games by date#2005|2005]]
|[[Arcade]]
|-
|''[[Mario Party 7]]''
|Cameo as item (Magic Orb)
|North America:<br>November 7, [[List of games by date#2005|2005]]
|Nintendo GameCube
|-
|''[[Mario & Luigi: Partners in Time]]''
|Non-playable character
|North America:<br>November 28, [[List of games by date#2005|2005]]
|[[Nintendo DS]]
|-
|''[[Mario Kart Arcade GP 2]]''
|Cameo as background
|Japan:<br>[[List of games by date#2007|2007]]
|Arcade
|-
|''[[Luigi's Mansion: Dark Moon]]''
|Non-playable character
|Japan:<br>March 20, [[List of games by date#2013|2013]]
|[[Nintendo 3DS]]
|-
|''[[Super Smash Bros. for Nintendo 3DS]]''
|Cameo as a trophy
|Japan:<br>September 13, [[List of games by date#2014|2014]]
|Nintendo 3DS
|-
|''[[Luigi's Mansion Arcade]]''
|Non-playable character
|Japan:<br>Summer, [[List of games by date#2015|2015]]
|Arcade
|-
|''[[Super Mario Maker]]'' (version 1.32)
|[[Mystery Mushroom]] [[Costume Mario|costume]]
|Japan:<br>February 4, [[List of games by date#2016|2016]]
|[[Wii U]]
|-
|''[[Mario & Luigi: Superstar Saga + Bowser's Minions]]''
|Non-playable character
|Japan:<br>October 5, [[List of games by date#2017|2017]]
|Nintendo 3DS
|-
|''[[Luigi's Mansion (Nintendo 3DS)|Luigi's Mansion]]''
|Non-playable character
|North America:<br>October 12, [[List of games by date#2018|2018]]
|Nintendo 3DS
|-
|''[[Super Smash Bros. Ultimate]]''
|Cameo as a spirit
|Worldwide:<br>December 7, [[List of games by date#2018|2018]]
|[[Nintendo Switch]]
|-
|''[[Luigi's Mansion 3]]''
|Non-playable character
|Worldwide:<br>October 31, [[List of games by date#2019|2019]]
|[[Nintendo Switch]]
|-
|''[[Luigi's Mansion 2 HD]]''
|Non-playable character
|Worldwide:<br>June 27, [[List of games by date#2024|2024]]
|Nintendo Switch
|}

==Gallery==
{{main-gallery}}
<gallery>
Luigi's Mansion (GameCube) -Professor Elvin Gadd artwork.jpg|''[[Luigi's Mansion]]''
Professor Elvin Gadd Artwork - Luigi's Mansion Dark Moon.png|''[[Luigi's Mansion: Dark Moon]]''
ElvinGaddTrophy3DS.png|''[[Super Smash Bros. for Nintendo 3DS]]''
SMM-CostumeMario-EGadd.png|''[[Super Mario Maker]]''
MLSSBMGhostGown.png|''[[Mario & Luigi: Superstar Saga + Bowser's Minions]]''
</gallery>

==Names in other languages==
{{foreign names
|Jpn=オヤ・マー{{ruby|博士|はかせ}}
|JpnC=<ref>{{cite|url=www.nintendo.co.jp/switch/ag3ja/stage/index.html|title=ルイージマンション３ : オバケホテル {{!}} Nintendo Switch {{!}} 任天堂|publisher=Nintendo|language=Japanese|accessdate=May 13, 2024}}</ref><ref>{{Cite|url=www.nintendo.com/jp/switch/banra/story/index.html|title=Official Luigi's Mansion 2 HD Japanese site}}</ref>
|JpnR=Oya-Mā-hakase
|JpnM=Pun on「おやまあ」(''oyamā'', Japanese exclamation for "oh my god!") and a reference to Nintendo designer「尾山佳之」([http://www.imdb.com/name/nm1195853/ Yoshiyuki Oyama])<ref>{{cite|title="Inside Zelda: Yoshiyuki Oyama, Monster Designer" - ''[[Nintendo Power]]'' Issue 201|date=March 2006|publisher=Nintendo of America|language=en-us}}</ref> +「博士」(''hakase'', "professor")
|ChiS=哎哟博士
|ChiSN=''Mario & Luigi: Superstar Saga''
|ChiSR=Āiyō Bóshì
|ChiS2=哎哟・喂博士
|ChiS2N=since ''Super Smash Bros. Ultimate''
|ChiS2R=Āiyō-wèi Bóshì
|ChiSM=Localization of the Japanese name;「哎哟」means "uh-oh" and「喂」(''wèi'') means "hey", and「博士」means "professor" or "doctor", which is used for addressing highly educated academics.
|ChiS2M=^
|ChiT=哎唷・喂博士
|ChiTR=Āiyō-wèi Bóshì
|ChiTM=Localization of the Japanese name;「哎唷」means "uh-oh" and「喂」means "hey", and「博士」means "professor" or "doctor", which is used for addressing highly educated academics.
|Dut=Professor K. Wibus
|DutM=Pun on ''kwibus'' ("weirdo")
|DutC=<ref>{{cite|url=nintendo.com/nl-nl/Games/Nintendo-3DS-games/Luigi-s-Mansion-1348382.html|title=Luigi's Mansion &#x7c; Nintendo 3DS-games|publisher=Nintendo.com|language=nl|accessdate=March 18, 2025}}</ref>
|Dut2=Professor Klemens Wibus
|Dut2M=^
|Dut2C=<ref>{{cite|quote=Ik, professor Klemens Wibus, woonde in dit duistere huis om de spoken te observeren, totdat de donkere maan opeens uit elkaar barstte en alle spoken enorm vijandig werden!|author=Gloomy Manor in-game description|title=''Luigi's Mansion: Dark Moon''}}</ref>
|FreA=Professeur E. Gadd
|FreAC=<ref>{{cite|title=''Luigi's Mansion'' Canadian instruction booklet|page=32|date=2001|publisher=Nintendo of Canada|language=fr-ca}}</ref>
|Fre=Professeur K. Tastroff
|FreM=Pun on "catastrophe"
|FreC=<ref>{{cite|url=nintendo.com/fr-fr/Jeux/Jeux-Nintendo-3DS/Luigi-s-Mansion-1348382.html|title=Luigi's Mansion &#x7c; Jeux Nintendo 3DS|publisher=Nintendo.com|language=fr|accessdate=March 18, 2025}}</ref><ref>{{cite|url=nintendo.com/fr-ca/store/products/luigis-mansion-2-hd-switch/|title=Luigi's Mansion™ 2 HD pour Nintendo Switch|publisher=Nintendo.com|language=Canadian French|accessdate=March 18, 2025}}</ref>
|Fre2=Professeur Karl Tastroff
|Fre2M=^
|Fre2C=<ref>{{cite|quote=Ton serviteur, le grand professeur Karl Tastroff, étudiait les spectres qui hantent le Manoir du désespoir quand la Lune noire a explosé, les rendant très agressifs !|author=Gloomy Manor in-game description|title=''Luigi's Mansion: Dark Moon''}}</ref>
|Ger=Professor I. Gidd
|GerM=Pun on German exclamation ''igitt'' ("ugh")
|GerC=<ref>{{cite|url=nintendo.com/de-de/Spiele/Nintendo-3DS-Spiele/Luigi-s-Mansion-1348382.html|title=Luigi's Mansion &#x7c; Nintendo 3DS-Spiele|publisher=Nintendo.com|language=de|accessdate=March 18, 2025}}</ref>
|Ger2=Professor Immanuel Gidd
|Ger2M=^
|Ger2C=<ref>{{cite|quote=Während ich, der große Professor Immanuel Gidd, die Geister in diesem Gemäuer studierte, zerbrach urplötzlich der Finstermond und alle Gespenster drehten völlig durch!|author=Gloomy Manor in-game description|title=''Luigi's Mansion: Dark Moon''}}</ref>
|Hun=E. Gadd professzor
|HunC=<ref>{{cite|url=kids.lego.com/hu-hu/sets/super-mario/luigis-mansion-lab-and-poltergust-expansion-set-da9abf4ce06745dad4f7be0f17d5bfaa|title=Luigi’s Mansion™ Lab és Poltergust kiegészítő szett|publisher=LEGO.com|language=hu|accessdate=May 13, 2024}}</ref>
|HunM=Professor Elvin Gadd
|Ita=Professor Strambic
|ItaM=Corruption of ''strambo'' ("wacky")
|ItaC=<ref>{{cite|url=nintendo.com/it-it/Giochi/Giochi-per-Nintendo-3DS/Luigi-s-Mansion-1348382.html|title=Luigi's Mansion Giochi per Nintendo 3DS|publisher=Nintendo.com|language=it|accessdate=March 18, 2025}}</ref>
|Kor=아라따박사
|KorR=Aratta Baksa
|KorM=Pun on "알았다" (''aratda'', Korean exclamation for "roger") + 박사 (''baksa'', "doctor")
|KorC=<ref>{{cite|url=nintendo.com/kr/switch/banra/exorcism/|title=루이지 맨션２ HD : 루이지의 유령 퇴치|publisher=Nintendo.com|language=ko|accessdate=March 18, 2025}}</ref>
|PorA=Professor D. Zastre
|PorAC=<ref>{{cite|quote=|url=www.lego.com/pt-br/kids/sets/super-mario/luigis-mansion-lab-and-poltergust-expansion-set-da9abf4ce06745dad4f7be0f17d5bfaa|title=Pacote de expansão - Laboratório e Aspirespectro de Luigi’s Mansion™|publisher=LEGO.com|language=pt-br|accessdate=August 20, 2022}}</ref>
|PorAM=Pun on ''desastre'' ("disaster")
|PorE=Professor A. Luado
|PorEM=Pun on ''aluado'' ("lunatic")
|PorEC=<ref>{{cite|url=nintendo.com/pt-pt/Jogos/Jogos-para-a-Nintendo-Switch/Luigi-s-Mansion-2-HD-2442032.html|title=Luigi's Mansion 2 HD|publisher=Nintendo.com|language=pt-pt|accessdate=March 18, 2025}}</ref>
|PorE2=Professor Anacleto Luado
|PorE2M=^
|PorE2C=<ref>{{cite|quote=Eu, o Professor Anacleto Luado, estava a observar os fantasmas da Mansão Obscura quando, de repente, a Lua Negra se despedaçou e os fantasmas se tornaram hostis!|author=Gloomy Manor in-game description|title=''Luigi's Mansion: Dark Moon''}}</ref>
|Rus=Профессор П. У. Галкин
|RusR=Professor P. U. Galkin
|RusM=From ''пугать'' (''pugat'', "to scare")
|RusC=<ref>{{cite|quote=Я, профессор П.У. Галкин, изучал духов Мрачного особняка. Но Темная луна исчезла, и призраки взбесились!|author=Gloomy Manor in-game description|title=''Luigi's Mansion: Dark Moon''}}</ref>
|SpaA=Profesor D. Sastre
|SpaAM=Pun on ''desastre'' ("disaster")
|SpaAC=<ref>{{cite|url=nintendo.com/es-mx/store/products/luigis-mansion-2-hd-switch/|title=Luigi's Mansion™ 2 HD para Nintendo Switch|publisher=Nintendo.com|language=es-mx|accessdate=March 18, 2025}}</ref>
|SpaE=Profesor Fesor
|SpaEC=<ref>{{cite|url=www.nintendo.com/es-es/Juegos/Juegos-de-Nintendo-Switch/Luigi-s-Mansion-3-1437312.html|language=es-es|title=Luigi's Mansion 3|publisher=nintendo.com|accessdate=December 5, 2024}}</ref>
|SpaEM=A clipping of "professor"
}}

==Notes==
*One of E. Gadd's voice lines, "Oyamaa", is both his Japanese name and an exclamation of surprise. This happens even in overseas releases. He can also sometimes be heard saying "Luigi!" or "Mario!"
*Professor E. Gadd is one of the few characters in the franchise who existed prior to [[Nintendo]]'s translating games and websites to Dutch to receive a new name in said translation, as opposed to keeping his English name.

==References==
<references/>

{{Humans}}
{{LM}}
{{MPA}}
{{M&LSS}}
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{{LM3}}
[[de:Professor I. Gidd]]
[[it:Professor Strambic]]
[[Category:Humans]]
[[Category:Scientists]]
[[Category:Mentors]]
[[Category:LEGO Super Mario characters]]
[[Category:Luigi's Mansion 3]]
[[Category:Luigi's Mansion: Dark Moon]]
[[Category:Mario & Luigi: Partners in Time characters]]
[[Category:Mario & Luigi: Superstar Saga characters]]
[[Category:Mario & Luigi: Superstar Saga + Bowser's Minions characters]]
[[Category:Mario Party 6 characters]]
[[Category:Mario Party Advance characters]]
[[Category:Super Mario Maker costumes]]
[[Category:Super Smash Bros. for Nintendo 3DS trophies]]
[[Category:Super Smash Bros. Ultimate spirits]]
[[Category:Super Mario-kun characters]]