When the so-called Bubblegum Bandit terrorizes Onion Falls, everyone but Yakkity becomes convinced that Trilo is behind the robberies. Yakkity decides to try and prove his shady agent's innocence. Sick of bearing the brunt of Rondo's practical jokes during the Senior's Practical Joke Week, Yakkity and Keo decide to get back at them using the official Jackie Pachyderm Practical Joke Kit.

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