Entrance: A painting of King Boo is shown laying on the ground before King Boo pulls himself out of it and giggles.
Exit: King Boo giggles at the opponent and sticks out his tongue at them before vanishing in a puff of smoke.
Standard (Light): Slaps
Standard (Medium): Bashes with his crown
Standard (Heavy): Sticks out his tongue
Launcher: Makes a Boo fly up from the ground and headbutt the opponent
Aerial (Light): Jabs with his tail
Aerial (Medium): Slaps twice
Aerial (Heavy): Slaps with his tongue
Crouching (Light): Slaps
Crouching (Medium): Sticks out his tongue
Crouching (Heavy): Headbutts
Grab: Shadow Portal
King Boo grabs the opponent before sucking them inside of their own shadow, dealing damage to them until they get spat back out.
Crown Beam: King Boo fires a beam of purple energy from his crown.
Peek-a-Boo: King Boo vanishes into thin air before reappearing behind the opponent.
Spirit Balls: King Boo summons three