Marvin falls hard for the new girl: A feisty nine-year-old named Tokiko, who turns out to be a karate whiz! But when Hank tells everyone that Marvin has to be protected by a girl, Marvin must defend his honor. So he enters a citywide karate contest to prove himself. Expecting to lay the smack down on trash-talking Hank, Marvin finds himself in competition with his crush! With stakes this high, can Marvin keep his karate cool?