Phantom Guy

Phantom Guys are red, yellow, and blue Boo Guys found in the Mario vs. Donkey Kong series.

Phantom Guys first appear as enemies in Mario vs. Donkey Kong. Like other enemies in the game, coming in contact with Mario will cause him to lose a life. Phantom Guys cannot be defeated, but they can be turned into blocks when Mario presses a button the same color as the ghosts. This will allow Mario to pass. Phantom Guys first appear in the Spooky House world. Shy Guys are transformed into similar-looking enemies by Donkey Kong's Color Switches in the boss stage.

In Mario vs. Donkey Kong 2: March of the Minis, they appear in the Spooky Attic stage. They function like in the last game for the most part, though now they are enemies to the Mini Mario toys, who serve as the game's playable characters. Once again, they can be turned into blocks when a certain button is pressed. This technique can be used to solve puzzles on the stages they appear. In the Construction Zone, Phantom Guys can be used in the Spooky Attic and Special Kit 3 sets. The latter allows them to interact with the game's new Mini Donkey Kong toys.

Phantom Guys are replaced by Polterguys in Mario vs. Donkey Kong: Minis March Again!.