Wall-E is a custom set made by Jeyo.
Wall-E is based off of Wall-E, the main character of the movie...uh...Wall-E.
He has wheels and treads that move, arms and "hands" that move and a "neck" that moves. included in the set is his plant.
Wall-E was built by Jeyo before 2010. Over the years it fell into disrepair as he cannibalized its parts for other creations. In July, 2012, he decided to bring it back. This he did, half rebuilding it and restoring it, with some modifications, to its original state.