Ghost is a rather special copy ability only playable in Kirby: Squeak Squad, obtained from the mini-boss Tedhaun, who replaces one mini-boss from each level after completing the Ghost Medal. Ghost Kirby cannot pass through solid objects, not even through floors or down ladders where normal Kirby can, but it lets Kirby directly take control of certain enemies and use their abilities as his own, instead of copy abilities. This easily gives Ghost the largest number of possible moves in the series.
Laser Ball is a common enemy who attacks by shooting a straight or deflected laser beam, and gives the Laser or BeamCopy Ability depending on the game. It floats freely, and has the ability to move through walls.