Grubb Trollmaine (voiced by Michael Bell) is the hash-slinging, burger-frying, trollffee-brewing proprietor and jack-of-all-trades behind Grubb's Diner, Trolltown's own greasy-spoon eatery, which sees its own share of action in several episodes, particularly where Blitz Lumpkin and Pixlee Trollsom come into play.

Grubb also has a sense of humour on the side, best exemplified in one episode where Blitz orders a Trollburger, "hold the mayo"--and Grubb takes the meaning rather literally, holding a handful of mayonnaise in front of Blitz' face.

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