Cappy was introduced as Mario's latest companion in Super Mario Odyssey, with the motivation of helping him stop Bowser's wedding on the moon in order to rescue Princess Peach and his sister, Tiara. Cappy is a Bonneter originally from the Cap Kingdom. His signature ability is notably being able to be thrown about at his own will, and allow Mario to possess several entities in the Mario universe. In Super Mario Odyssey, Cappy can be either fully part of Mario's abilities or be separately controlled by a second player. He also changes his appearance with the hat of Mario's choice, with his eyes appearing in the center to show off that he's there.
As a moveset element
Cappy appears cosmetically within Mario's moveset while using up special, Super Jump Punch. When he appears, the coins that appear change to that of the regional coins from New Donk City. He also appears as Mario's side taunt, where Mario throws him with Cappy circling around him once before Mario catches him and puts him back onto his head. In both instances that he appears, he retains the appearance of Mario's hat.
As a costume
Cappy is also available as a hat for the Mii Fighters.
Cappy also appears as an Advanced-class support spirit.
In Adventure Mode: World of Light, Cappy is presumably one of the countless spirits captured by Galeem during his takeover of the universe. Pauline's spirit is located in the cloud section of The Light Realm.
Cappy uses a Mario puppet fighter and is fought on the Rainbow Cruise stage, referencing the Odyssey airship which Cappy pilots. During the battle, the Boomerang item appears, referencing how Cappy is thrown like a boomerang, while Mario turns invisible, referencing how Cappy takes the form of hats and appears invisible to the naked eye.
Names in other languages