Dave the Barbarian - Season 1 Episode 3 -

Faffy is sad because the family forgot to get him anything during Dragon Appreciation Week, so Dave buys Faffy a diseased weasel for a pet. The diseased weasel gets all of Dave's attention, so Faffy runs away. The weasel turns out to be Chuckles The Silly Piggy, who wants to steal a magical fruit hidden in Faffy's room