The following gallery shows every treasure in Wario World, with the level it is located in and which colored chest it corresponds to. Every other level's pink treasure is a Nintendo game system.
Greenhorn Forest
Greenhorn Ruins
Pink Chest: NES
Horror Manor
Wonky Circus
Pink Chest: Nintendo 64
Shivering Mountains
Beanstalk Way
Pink Chest: Game Boy Advance
Mirror Mansion
Pecan Sands
Pink Chest: Nintendo GameCube