Muk are Poison-type Pokémon intoduced in Generation I.
In SMG4: High School Mario, they first appeared as the failed cake of Wario and later appeared in the lunch scene, where Zangief serves them to Mario and the crew. One attacks Toad, while Mario has no problems eating one.
One appears as an object that Donkey Kong throws at Mario in SMG4: Mario VS Donkey Kong.
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