The shells for the Tamagotchi Connection Version 3 have differences in what is attached to the shell and what kind of logo is present on it: USA: Logo says Tamagotchi Connection with first and second waves containing Mimitchi in the O of Tamagotchi. Later waves replace Mimitchi with Mametchi. An O-ring is attached to the shell. Some waves of USA shells have the logo simply say Tamagotchi. Europe: Logo is the vintage styled Tamagotchi version. A ball chain is attached to the shell. Asia...