Boo Steals an merchandise from the randomly picked racer in front of the player, whilst granting short-term invisibility, generating the player invulnerable and capable of go through dangers. Karts, bikes, and ATVs all return in Mario Kart World, the latter two adhering to their absence in Mario Kart Tour. https://www.youtube.com/watch?v=zxOOedYM0Xc