

If there is nothing to steal, the Boo will give his user a free Mushroom. It also will not steal other Boos as it is impossible to have more than one in play at a time. It will not steal Piranha Plants or Bullet Bills that are currently in use, nor will it steal Crazy 8s. Fire Flowers, Boomerang Flowers, Golden Dash Mushrooms and Triple items will be fully restored as if the player had just got them from the Item Box. In Mario Kart 8 Deluxe, Boo will steal from the main item slot of a random racer who is ahead of the user, and place it in the user's reserve slot. It just will not deposit anything in your Item inventory. No Item for you! But do not worry, the Boo will still come back to say goodbye. In all games except for Mario Kart 8 Deluxe, it will steal the strongest item in play, and in Super Mario Kart, the steal will work even if the opponent's Item Roulette has not yet stopped. It just depends on whatever the other opponents have. They will steal it, and then fly back to bring it to you (yes, stealing is perfectly legal in Mario Kart)! It could be anything from a Starman (a great Item) to a Green Shell (an okay Item). In addition to invisibility, a Boo will go and fly off to another racer who has an Item.

But it is still extremely convenient for cutting corners and avoiding incoming Items, making a Boo a great recovery and defensive Item. That would be, like, cheating) and you can drive off the track. However, they still slow down when they crash into walls (sorry, no passing through walls.


While invisible, the racer cannot be hit by any Items whatsoever, and they are also not hindered by driving off-road. The player themself sees their kart turn into a ghost, similar to the ones in Time Trials. A Boo, probably the sneakiest Item in Mario Kart, temporarily turns the racer who is using it completely invisible to all other opponents.
