There are three variations of Treasure Chests that Mickey can find throughout Epic Mickey. The first set of Treasure Chests don't open up like the others, and must be broken with a spin attack in order to get the items inside. These are the ones that often have tickets in them. The second type of Treasure Chests, the big red kind, are opened by Mickey with the touch of the A button, and often have pins of any color or variation. The third kind are arguably the most important kind in the game. The blue Treasure Chests always house Character Parts (i.e. Animatronic Goofy's arm, for example).
Treasure Chests make a return in Epic Mickey 2, where their role is the same, though blue treasure chests contain other items. This time blue chests now require for Oswald's electricity to open.