Editing Blue Shell

{{about|the normal [[Koopa Troopa]] shell|the blue version of the [[Spiny Shell (red)|Spiny Shell]] which appears as a ''[[Mario Kart (series)|Mario Kart]]'' item|[[Spiny Shell (blue)]]}}

|image=[[File:ShellNSMB.png|200px]]<br>Artwork of a Blue Shell from ''[[New Super Mario Bros.]]''

'''Blue Shells''', also known as '''Blue Koopa Shells''',<ref>Loe, Casey. ''New Super Mario Bros.'' Player's Guide. Page 8.</ref> are blue [[Koopa Troopa]] shells that first appear in ''[[Super Mario World]]''. While occasionally worn by Koopa Troopas, they are more prevalent as [[List of items|items]] that [[Mario]] or [[Luigi]] can use.

Blue shells first appear in ''[[Super Mario World]]'', either alone or on the back of a Koopa Troopa. As with other colors of shells, jumping on a Koopa Troopa will cause the shell to be removed, where it can then be held or [[Shell Toss|thrown]]. When [[Yoshi]] eats one, he will [[Winged Yoshi|grow wings]] and gain the ability to fly for a limited time, at the end of which he will [[swallow]] the shell. [[Yoshi (species)|Blue Yoshi]] can gain this ability by eating a shell of any color. Yoshis can also spit the shell back out, in which case it will behave like a [[Green Shell]], flying out at high speed and defeating enemies in its way. If the player attempts to launch the shell back at a blue Koopa without a Shell, it will stop the shell and kick it back at the player. If a green or red Koopa without a Shell comes in contact with the Blue Shell (or kicks it right-side up if upside down), it will then jump in it and become that colored Koopa.

According to the Japanese Shogakukan guide for the game ''[[Yoshi (game)|Yoshi]]'', Blue Shells from ''[[Super Mario World]]'' are filled with refreshing mints and have a herbal scent.<ref name=Sho>「任天堂公式ガイドブック　ヨッシーのたまご」 (''Nintendo Kōshiki Guidebook – Yoshi's Egg''), [[:File:Yoshi no Tamago Shogakukan 61.jpg|page 61]].</ref>

Blue shells appear again in ''[[New Super Mario Bros.]]'', this time as a power-up. It turns Mario or Luigi into [[Shell Mario]] or Shell Luigi respectively upon contacting it. By using the Blue Shell, the player gains the ability to [[shell dash]]. While ducking or shell dashing, Shell Mario or Shell Luigi are invulnerable to almost anything, excepting boss attacks and falling into a pit, poison, or lava. They can also [[Ground Pound]] on [[Spiny|Spinies]] to send them spinning in their shells, similarly to a Koopa Troopa when kicked.  Additionally, the power-up allows them to swim faster and with more precision, similar to the [[Frog Suit]] from ''[[Super Mario Bros. 3]]''.

[[File:True Blue Shell.png|thumb|A Blue Shell from ''Super Mario Strikers'']]

The Blue Shell appears in ''[[Mario & Luigi: Bowser's Inside Story]]'' and [[Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey|its 3DS remake]] as an item found in the overworld and once in the [[Energy Hold]] in Bowser's Body. By striking [[shell block]]s, Mario can go in Blue Shells and turn into Shell Mario. Luigi can then hit Mario using his [[hammer]] to make Mario retract into the shell, spinning straight forward. This can be used to hit blocks in areas that Mario and Luigi cannot directly enter. Because the shell is so heavy, Mario cannot jump while wearing it. If he attempts to jump, he tosses the shell off of his body and it disappears. This serves a similar purpose to [[Kooper]] and [[Koops]]'s field abilities in the [[Paper Mario (series)|''Paper Mario'']] series.

A model of a Blue Shell exists in ''[[Mario Kart 7]]''{{'}}s game files.<ref>''[[tcrf:Mario Kart 7#Blue Shell|Mario Kart 7]]''. ''The Cutting Room Floor''. Retrieved January 13, 2023.</ref>

|Jap=青コウラ<br>''Ao Kōra''<br>こうら<ref>https://www.nintendo.co.jp/ds/a2dj/newmario/index.html</ref> (''New Super Mario Bros.'')<br>''Kōra''

|JapM=Blue Shell<br><br>Shell

|Chi=龟壳<ref>https://www.ique.com/games/Mariobros/newmario.htm</ref>