If a player has the Fighter Kirby copy ability and enters the Street Fighter command for the Hadoken, Kirby will instantly do a charged version of the attack.

In the 3rd level of the 5th world, there is a screw puzzle that, once completed, can be fully unscrewed to reveal two Waddle Dees crudely drawing a battle between Kirby and King Dedede. These Waddle Dees later appear in the 8th level of the 6th world with the same puzzle, where they are playing Kirby's Adventure on a Famicom system.