Pooh's Heffalump Movie (2005)

The quiet of the Hundred Acre Wood is broken by a loud and mysterious sound. Is it a trumpet? Is it a roar? No one seems to know. Hysterical - in a Pooh and friends sort of way - the gang rushes off to Rabbit's house in hopes of discovering what's making that scary sound. Of course, Lumpy, the baby heffalump is nothing like the terrifying, ferocious creature Pooh and his friends have been so afraid of for so very long. Lumpy's a sweet, roly-poly, bundle of energy who thinks being captured is just another game.

Official website: http://disney.go.com/disneyvideos/animatedfilms/heffalump/main.html