Fatbuckle is a member of Gumby's band The Clayboys. He is the band's drummer. He appears in Gumby the Movie (1995) and is voiced by Primus' vocalist/bassist Leslie Claypool.
For hair, Fatbuckle has three light blue triangles on his head, one on his head and two on his ears. He is called Fatbuckle because he had a big belt. He has the medium height of the Clayboys, with Thinbuckle the tallest and Nobuckle the shortest.
Gumby The Movie
In the movie, Fatbuckle and the rest of the Clayboys play at a benefit concert to help the farmers. Then the Blockheads kidnap them and they get cloned. In the end, they are in a video shoot on TV.
Information from http://www.gumbyworld.com/gumby-characters/the-clayboys/