SpongeBob and Sandy see the beaten up civilian, realizing Squidward had used karate for vengeance. As punishment, Sandy uses her mind-eraser gadget to erase Squidward's knowledge of karate, and the "criminal" rises, about to to beat Squidward to a pulp as the episode ends.
This episode sucked.
Sandy and Spongebob are unlikeable, oh and look it's a new episode so Squidward's gonna have a bad ending and Spongebob told Squidward to be ashamed? Ha, What the hell has happened to this show!