From the Super Mario Wiki, the Mario encyclopedia
Fortune Island is a location from Paper Mario: Color Splash. The path leading here is unlocked after getting the purple Mini Paint Star in Lighthouse Island, and when the Purple Big Paint Star in here is rescued, it will color in a massive sinkhole at Mustard Café. Wendy is the boss of this area. The Grill Thing can be found here, and must be acquired to enter the final room.
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