Rockmobile is one of the mutant toys in Toy Story. He is the head of a praying mantis or fly stuck on the (presumably) legless body of a Combat Carl action figure which is stuck in the headless and legless torso of a Rocky Gibraltar toy controlling it with a car steering wheel. The praying mantis-headed figure can drive the body around using the arms to walk on.
Toy Story[]
In Toy Story he's first seen on Sid's workbench, along with Pump Boy, Legs, and Ducky, retrieving parts of Janey and Pterodactyl. Initially thought to be a cannibal, the mutant toys later turned out to be friendly after they fixed Buzz and repaired the Janey Doll and the Pterodactyl.
Toy Story: The Video Game[]
Rockmobile appears in the later part of the level "Battle of the Mutant Toys" in Toy Story: The Video Game. He, along with Legs and Babyhead will attack Woody and Buzz on Sid's workbench. Using Buzz's karate chop action, they're able to escape.