Grate Guy is one of Booster's jesters, and is the partner of Knife Guy. They appeared as a boss in Super Mario RPG: Legend of the Seven Stars.

When Mario, Mallow, Geno, and Bowser were chasing after Booster onto the balcony, Knife Guy and Grate Guy attacked them, but they defeated the two jesters. Afterward, Grate Guy opened up a casino in Bean Valley.

In battle, Grate Guy has 900 HP, 60 ATK, 40 DEF, 25 magic attack and 40 magic defense. He uses magic attacks Meteor Blast and Echofinder, and he is weak against thunder.

His Psychopath thought is "Peace is just a dream."


  • Their names are a pun on "Nice Guy" and "Great Guy"
  • They play a slightly similar role to Smithy's jesters Cloaker and Domino, except less sinister