Healding (formerly Abstallion) is the Hidden Universe's DNA sample of a Caballus Stallius from an unknown planet.
He first appeared in the season one two-parter finale Ben 10: Alien Universe Unleashed. In it, he was an accidental transformation resulting from picking Benwolf.
Back in Action: Alien Universe
- Ben 10: Alien Universe Unleashed (first appearance; accidental transformation, selected was Benwolf)
- His name is pronounced "hell ding." It is a portmeanteau of "heal" and "gelding."