Thomas the Hippo
From SquackleWiki
Thomas the Hippo is the “mascot” of Twiggs Cereal.
He does anything he can to get his hands on Twiggs Cereal, even if it means murder. He dresses up as people to get kids to give him the cereal.
Relevant articles:
http://squackle.com/8695/broadcasting-company/twiggs-cereal/