Editing Red Coins in Boo's Big Mouth

'''Red Coins in Boo’s Big Mouth''',<ref>{{cite|author=Averill, Alan, and Jennifer Villarreal|title=''Super Mario Sunshine'' Player's Guide|page=87|publisher=Nintendo of America|language=en-us|date=2002|isbn=1-930206-23-2}}</ref> also called '''The Lobby’s Other Secret''',<ref>{{cite|author=Bogenn, Tim, and Doug Walsh|title=''Super Mario Sunshine'' Official Strategy Guide|page=96|publisher=BradyGAMES|language=en-us|isbn=0-7440-0180-3|date=2002}}</ref> is the bonus ninth episode of [[Sirena Beach]] in ''[[Super Mario Sunshine]]''. It can be accessed by replaying [[The Hotel Lobby's Secret]].

Re-entering the secret course in said episode will allow [[Mario]] to use [[F.L.U.D.D.|FLUDD]] and do a [[Red Coin|red coin]] challenge. The [[Red Switch Plate]] is placed at the top of the tall wall the player has to Wall Jump up to. Ground Pounding the switch will cause eight red coins to appear in the course, and the player has to collect them all within a time limit of a minute and 30 seconds. Three Red Coins are on the upper path of the sand block section, and the third one requires a [[Side Somersault]] or [[Spin Jump]] to reach. One Red Coin is placed at the end of the block structure. One Red Coin is located under the [[Ice Block|ice block]]s of the structure, and Mario can drop down to this path and spray the blocks with FLUDD to make them evaporate. The final three Red Coins are located over the sand block pyramid; one of them is high above the front of the pyramid, and reaching it requires Mario to hover from either an upper level of the pyramid or from the top of the block structure. The other two Red Coins are on the left and right side of the pyramid. The Shine Sprite will appear at the end of the course once every Red Coin is collected, but failing to collect them within the time limit will result in Mario losing a life.

|ItaN=Shared with [[Red Coins of the Hillside Cave]], [[Blooper-Surfing Sequel]], [[Sandy Shine Sprite]], [[Red Coins in the Cannon]], and [[A Golden Bird]]