Ben 10

A vicious, intergalactic conqueror from an unknown alien species and an unspecified planet, Vilgax will stop at nothing to obtain the Omnitrix and use it to build an army capable of conquering every planet in the galaxy. After being severely injured after a final attack from the ship that was transporting the Omnitrix, he was confined to a regeneration tank, ordering his robotic minions and cosmic bounty hunters to track down the Omnitrix, not realizing that his minions are outsmarted and outfought by Ben. While his body was being repaired, he was also being cybernetically enhanced. When he was finally able to leave the regeneration tank, he had been enhanced to the point that none of the Omnitrix's aliens could so much as scratch him. Vilgax's ship was destroyed with him still aboard, but the fact that he could survive every attack by the Omnitrix's aliens and a sizeable fall puts his demise into question. His ability to survive the destruction of his previous ship by a nuclear missile, at which point he had not been enhanced, casts further doubt on his demise.

Before His Injuries

After Vilgax Recovers from his  Injuries (Enhanced with Alien Technology)