Chompy

He is Bowser Junior's Pet. Originally a magic 8 ball and a silver slinky that were binded together by Craig the Devil's powers.

Trivia

 * Chompy will be a permanent part of Bowser's family Confirmed In Dabhdude Livestream.
 * Bowser Junior named him "Chompy" as seen when he calls him Chompy in Bowser Junior's Lemonade Stand!.