Jack the Knife

Jack the Knives are formed after all their rage of butter-spreading and other jobs knives do. They are bigger versions of knives (however not too big, about the size of Wario) and have eyes. They jump out of tables of the S.S. Caviar and try to attack Wario. Mack the Knife has a similar name to them, but it might be coincidental.

Trivia

 * Their name is a pun of "Jack Knife" a type of knife.