Cappy is Mario's primary companion and most important tool. He allows Mario to:
- Throw: Attack enemies, collect coins, activate switches, and break objects.
- Capture: Possess certain enemies and objects, granting Mario their unique abilities. This is the core mechanic of the game, allowing access to new areas and solving puzzles.
- Cap Jump: As mentioned above, Cappy provides an extra jump.
- Cappy Spin Attack: A defensive and offensive maneuver.
Learning which enemies can be captured and how to effectively use their abilities is key to progression and finding hidden Power Moons. Each captured form has its own unique moveset.