Lumpy is a happy-go-lucky, fun-loving, and energetic youngster who wants nothing more than to bounce and play with his best friend, Roo. He loves helping others, but sometimes his love for bouncing causes aggravation for Gopher.
Lumpy is a young Heffalump with lavender skin, violet yarn hair, and a violet rabbit tail with the body, face, trunk, and ears of an elephant.
Lumpy makes his debut in the series in the world Hundred Acre Wood.
Lumpy is one of the main characters in the 2005 Disney animated film, Pooh's Heffalump Movie.