Stupid Mario Brothers

A Monkey for your Thoughts? (1x10)

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Mario and Luigi are eating bananas by the mailbox. Donkey Kong arrives to pick up a letter, which tells him that Mario and Luigi have stolen his bananas. In his fury, Donkey chases Mario and Luigi. Eventually, the UPS man shows up with another letter for Donkey Kong, which reveals who the real thieves are. Donkey Kong finds the culprits, who immediately regret their crime.