The debate over Ben Tennyson’s strongest alien is as old as the Omnitrix itself. Depending on whether you prioritize raw physical strength, destructive capability, or reality-warping powers, the answer changes.
He can recreate the entire universe from scratch, a feat he famously performed in Ben 10: Omniverse after the Annihilargh destroyed it.
He can manipulate time, teleport instantly, and is virtually indestructible.
If you define "strongest" as physical strength and durability, is the champion.
Axiom turned its featureless face toward him. And spoke . Not with sound, but with pure conceptual force:
"I… came here to negotiate," Vilgax whispered, his voice hollow. "Why did I come here?"
"You never built the bomb."
Alien X is essentially a god. His thoughts become reality, allowing him to recreate entire universes or erase enemies with a blink.