I haven't been able to come up with one, Arielflies. The only thing I could find that even comes close is the character, Beans, played by Isla Fisher in Rango. I doubt that's the one you have in mind.

Ender's Shadow is the second of the novels and focuses heavily on Beam as I recall, but there's no movie. Gavin Hood apparently wanted to film it along with Ender's Game because the two books are parallel to each other in terms of time frame. The second one tells it from Beam's perspective. He couldn't get the money to film them together.

Sorry I couldn't be more helpful.