The Prisma Museum is a hidden museum found in Paper Mario: Color Splash. Its entrance is located in the Action Command Dojo, and is run by the Card Connoisseur Toad. It is the equivalent to the Sticker Museum from Paper Mario: Sticker Star, as the Battle Cards that Mario obtains throughout the game can be donated to the museum and viewed later at any time. The museum is opened when Mario meets with the Card Connoisseur Toad at the dojo after receiving a letter from him at the post office.
The Prisma Museum is divided into five exhibits: the Basic Card exhibit, the Enemy Card exhibit, the Thing Card exhibit, the art gallery, and the sound gallery. Each exhibit is run by a pink Toad. In the card exhibits, Mario can speak to the Toad to make a donation, then view them using the interactive device in the center. By donating enough cards, Mario can unlock and view concept art for the game in the art gallery. In the sound gallery, the player can listen to music from the game, which are unlocked by receiving gold flags for stages. If Mario has any cards in his inventory that can be donated, a star above the door leading to the appropriate exhibit will light up.
The Prisma Museum accepts every Battle Card in the game (not counting the Huey Thing and Super Roshambo cards), making up a total of 60 Basic Cards, 72 Enemy Cards, and 27 Thing Cards. After the collection is complete, the chandelier in the lobby will light up, and Toads will visit the museum.
While Mario is in the Prisma Museum, he cannot swing the Paint Hammer.
Each time Mario reaches a milestone in the number of Battle Cards donated to the museum, eight pieces of concept art are added to the gallery. There are a total of 40 art pieces.
For every stage Mario colors in all of the colorless spots and receives a gold flag, a record featuring music related to that stage is added to the sound gallery. In the cases of the Black Bowser's Castle and Special records, they are unlocked after beating the game and coloring every colorless spot in the game, respectively. There are a total of 33 records, and 142 songs.
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