Ambulon

Ambulon is a Decepticon turned Autobot who appears in the IDW portion of the Generation 1 continuity family.

Ambulon was part of a Decepticon combiner experiment. This experiment is responsible for his current alt-mode...a leg. Years later he joined the Autobots as a Medic and was stationed at Delphi.

"I Have the World's worst alt mode: I turn into a leg. Ambulon: from the verb "to ambulate," meaning "to walkabout." It's a stupid name..."

"...But all the best names are taken."

- Ratchet and Ambulon.

More Then Meets The Eye
Ambulon is stationed at Delphi with his fellow medics First Aid and Pharma.