A "ghost" appears at the Middleton HS cafeteria and writes Ron's name on the wall in gravy. Later, Yuri from the Yamanuchi School comes to Ron's house and tells him that Sensei has been kidnapped, and Monkey Fist is the prime suspect. The gravy ghost then appears, then resolves into an image of Sensei. Ron and Yuri go globe-hopping to rescue Sensei from Monkey Fist. Kim, finding out about their trip, gets jealous (much to her denial), and follows. When Kim catches up to them, she's convinced that Yuri is a friend, and joins their search for Monkey Fist. They find him at an abandoned zoo, unwittingly leading the true kidnapper of Sensei to Monkey Fist, who is the kidnappers true target. Ron, Yuri, Kim, and Monkey Fist are captured by a group of mutant gorillas, led by a speaking gorilla that refers to Monkey Fist as Monty (his original human name). The gorilla ejects everyone but Monty out of the gorilla dungeon. After regrouping, they decide it's the honorable thing to rescue Monkey ... Written by
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The hair of the gorillas changes from brown to dark blue and back in different scenes. See more
[after Ron loses his pants avoiding flying monkey teeth
Oh, Stoppable-san! You make danger comical with your American-style buffoonery.