Mametchi, the mascot of the Tamagotchi series.

Mametchi is a smart Tamagotchi with an I.Q. of 250. It is famous for the bizzare amount of times it has appeared in games.

Party on!

He appears in Mario Party Star Power as a playable character. To unlock him, you must clear the story mode with Mario,Yoshi, and Sonic the Hedgehog.