Boo Steals an product from a randomly picked racer in front of the participant, although granting non permanent invisibility, producing the participant invulnerable and capable of go through dangers. Karts, bikes, and ATVs all return in Mario Kart World, the latter two subsequent their absence in Mario Kart Tour. https://bookmarkshome.com/story5573558/mario-kart-world-no-further-a-mystery