King Boo is one of the last bosses in Super Mario Sunshine.
Which is a little amusing since he was the final boss of Luigi’s Mansion. So him and Mario have already met once.
This one is on a big roulette-like wheel. You have wait for him to spit out some spicy peppers instead of enemies.
And then hit him with something like a pineapple.
Probably one of the tougher battles in the game but I enjoyed it.