Round 1:
Koopa Troopa vs. Boo
As the battle starts, Koopa hops out of his shell and flings it at Boo.  Unfortunately for the turtle, Boo vanishes from sight, and the shell flies right through the ghoul.  Koopa, left defenseless, is battered back by Boo's barrage of slaps, until he topples over backwards.  With a decisive blow, Boo slams the Troopa over the head with a hard headbutt, knocking the turtle out of the fight.

Boo advances...