Mametchi is a Tamagotchi from the interactive handheld game that shares its title with the species. He's also a speed type racer in Mario Kart Arcade GP 2, and has three Special Items, the Mame Block, the Bagubagutchi?, and the Chibi Syrup.
Mametchi has a basic small body that is light yellow. His head is large in comparison and is also light yellow. He has two dark blue ears on the top of his head, and his cheeks are bright pink. Mametchi's eyes are large with dark blue pupils. His mouth is a wide smile.