In Disney's adaptations of the stories, Heffalumps are first mentioned in the 1968 featurette Winnie the Pooh and the Blustery Day, and seem to be a product of Tigger's imagination. Heffalumps first actual appearance was in the television series The New Adventures of Winnie the Pooh. In both the animated films and all subsequent television series, they are also depicted as looking like elephants, albeit slightly cuddlier and less fierce than those Pooh imagines in the books and with rabbit-like tails.
Piglet also befriended a young heffalump named Junior in two episodes of The New Adventures of Winnie the Pooh. Junior lived with his parents, and his father, Papa Heffalump, was voiced by Jim Cummings. Mama Heffalump often had to remind Papa Heffalump of his many allergies. They appeared in a song called Heffalumps and Woozles with their partners, the woozles, in the film The Many Adventures of Winnie the Pooh. Here, Tigger described them as honey-eating monsters. They and the song are also featured in the attraction at Walt Disney World, also called The Many Adventures of Winnie the Pooh, where the riders travel through the heffalumps and woozles in Pooh's dream.
DisneyToon Studios presents a charming new journey through the Hundred Acre Wood, Pooh's Heffalump Movie, featuring the voice talents of Jim Cummings as friendly Winnie the Pooh and the irrepressible Tigger, Ken Sansom as smart but stubborn Rabbit, Kath Soucie as Roo's caring mother Kanga, John Fiedler as little Piglet, Peter Cullen as delightfully dismal Eeyore, and Nikita Hopkins as Roo. The cast is bolstered by the addition of two-time Oscaroreg; nominee Brenda Blethyn as Mama Heffalump and introduces Kyle Stanger as the voice of Lumpy. The film is written by Brian Hohlfeld and Evan Spiliotopoulos and is directed by Frank Nissen. Producer is Jessica Koplos-Miller and associate producer is Clay Renfroe. Animation director is Don MacKinnon.