Sidekey

"Sidekeys feature eponymous key-like biological structures protruding from their sides. Their mechanical appearance made them the perfect mascot for the Mimpins club. Wild sidekeys can only be lured into dances with exclusive Mimpins treabies."

Sidekey is an ooblet found in Ooblets (game).

You can get Sidekey for free at the start of the game if you join the Mimpins Club, Or buying the last "More ooblets" upgrade in the wishywell.