Super Mario Sunshine is a 2002 platform game developed and published by Nintendo for the GameCube. It is the second 3D game in the Super Mario series, following Super Mario 64 (1996). The game was directed by Yoshiaki Koizumi and Kenta Usui, produced by series creators Shigeru Miyamoto and Takashi Tezuka, written by Makoto Wada, and scored by Koji Kondo and Shinobu Tanaka.

The game takes place on the tropical Isle Delfino, where Mario, Toadsworth, Princess Peach, and five Toads are taking a vacation. A villain resembling Mario, known as Shadow Mario, vandalizes the island with graffiti and leaves Mario to be wrongfully convicted for the mess. Mario is ordered to clean up Isle Delfino, using a device called the Flash Liquidizer Ultra Dousing Device (F.L.U.D.D.), while saving Princess Peach from Shadow Mario.

Super Mario Sunshine received critical acclaim, with reviewers praising the game's graphics, gameplay, story, soundtrack, and the addition of F.L.U.D.D. as a mechanic, though some criticized the game's camera and F.L.U.D.D.'s gimmicky nature as well as the decision to use full voice acting for some characters. The game sold over five million copies worldwide by 2006, making it one of the best-selling GameCube games. The game was re-released as a part of the Player's Choice brand in 2003. Nintendo EPD re-released it alongside Super Mario 64 and Super Mario Galaxy in the Super Mario 3D All-Stars collection for the Nintendo Switch in 2020.