King Boo is a tough cookie all right, but in the end he’s no match for Luigi. Luigi has thunder and other special abilities that would help him take down King Boo easy. King Boo may be a powerful warrior, but Luigi has the vaccum cleaner. King Boo and Luigi are archenemies, but like many rivalries the Hero is the one who stays at the top. King Boo will be back someday to pwn, but that time isn’t right now. Luigi wins.