Polterguys first appear as enemies in Mario vs. Donkey Kong. Like other enemies in the game, coming in contact with Mario will cause him to die and lose a life. Polterguys 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. Polterguys first appear in the Spooky House world.
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, Polterguys 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.
In Mario vs. Donkey Kong: Minis March Again!, Polterguys are redesigned and renamed. While they still have a somewhat spectral appearance, they now have a spherical aura of fire similar to Pyro Guys, and the addition of an active wind-up key on their backs suggests their mechanical nature. Unlike previous appearances, they remain in the same spot rather than float in a given pattern, although they do turn to face Mini Marios. They are first encountered in Room 3-5.
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