Invasion of the Boyfriend Snatchers

A hot vampire called Antonio, captain of the school's slam-jitsu team catches Summers eye. She, Heidi and Bobby go to join Slam-Jistsu but when Heidi shows how good she is at Slam-Jitsu, Antonio falls for her instead of Summer. Heidi promises that she'll put in a good word for Summer when training with him but instead ends up kissing him. Summer and Bobby see them kissing and Summer and Heidi end up arguing. They challenge each other to a Duel in Slam-Jitsu. Who will win?