|Happiness is hip!|
|Strong Against||Thunder, Sleep|
|Yoshi Cookie||Yoshi Cookie|
Knife Guy works with Grate Guy as entertainers and bodyguards of Booster. They team up to take down Mario as he is escaping from Booster Tower. Knife Guy is not much of a challenge on his own, but can become quite tough if he teams with Grate Guy. After Mario defeats him he decides to work on his juggling skills in Booster Tower.