King Boo is unlocked by winning the star cup in 50cc mode. King Boo is a member of the Boo species. He is bigger than the rest, and he wears a crown. He is the king of all the Boos, hence his name King Boo. He is vanquished at the end of Luigi's Mansion by Luigi. Being a Heavy Weight Class character, he drives Large vehicles.
Recent games where King Boo appeared are: Luigi's Mansion, Mario Kart Wii, Mario Kart Double Dash! and Super Mario 64 DS. He likes to play tricks/pranks/jokes on Mario and his friends, some of them being rather deadly. He also appers on Mario Party 8 in his course.
Handling +5, Off-road +3.