Prism Island

Prism Island is the main setting of the game Paper Mario: Color Splash. The island is first found drained of half its colors. Mario, Princess Peach and Toad came here to solve a mystery about a colorless Toad, after noticing that the stamp on him is the same on the Prism Island map in Mario's House.

On the island is a Bowser Tape, implying that Bowser is responsible for the colors now gone. This was later confirmed on the September 13 episode of Nintendo Life, with it also revealing that Bowser had been covered by Black Paint and intended to share the dark gift of it (although Princess Peach in her message to Mario upon being kidnapped implied that Bowser was not himself).

Levels

 * Ruddy Road
 * Bloo Bay Beach
 * Château Chanterelle
 * Mondo Woods
 * The Crimson Tower
 * Port Prisma
 * Dark Bloo Inn
 * Plum Park
 * Golden Coliseum
 * Roshambo Temple
 * A waterwheel course
 * A train course
 * A plains course
 * A ruins course
 * A course with warp pipes
 * A radio station course
 * A circus course
 * A volcano course
 * A course set in a crater filled with lava
 * A secret water base course

Entertainment
Toads celebrate a day called "Oceanfest", where they participate at multiple games to win a key as the first prize, allowing the winner to enjoy the beach.