Ben Tennyson

"It's Hero Time!"

- Ben's catchphrase.

Benjamin Kirby "Ben" Tennyson is a Human, cousin of Gwen Tennyson, and the grandson of veteran Plumber Max Tennyson and the Anodite Verdona.

Appearance
Ben's physical appearance has changed throughout the series from a 10 year old to a 16 year old. However, he retains some recurring characteristics. He has brown hair, green eyes, pale skin, and is quite skinny for his age, though he shows a lot of muscle definition due to being athletic.

History
At the age of 10, he came in possession of the Omnitrix, a watch-like alien device containing genetic material from numerous different species, which allows him to temporarily transform into a number of alien forms.

During this time he battled foes such as Kevin Levin, and Vilgax.

When Ben was 10 or 11, he became obsessed with an alien named Feedback. Feedback was destroyed by a villain named Malware.

Sometime after he turned 11, he took off the Omnitrix for an unknown reason.

Ben ended up wielding the Omnitrix again at age 15, and it recalibrated giving him 10 new alien transformations.

Later, he came to wield the Ultimatrix, an Omnitrix with the ability to evolve his aliens into more powerful forms.

Around this time he turned 16. The Omnitrix he had used prior turned out to have been a prototype, and he received the real Omnitrix, after Azmuth deemed him worthy of it.

On Multiple occasions, Ben has met his future self, in doing so changing the future multiple times.

Canon Aliens
These are Omnitrix transformations that have appeared on-screen through the course of the franchise, or at least have been confirmed to exist by crew members.

Non-Canon/Alternate Timeline Aliens
These are Omnitrix transformations that are not canon to either the original or reboot continuities. This also includes aliens that are either exclusive to specific alternate timelines or were created by crew members.