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 from a 10 year old to a 16 year old. However, he retains 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 an Osmosian named Kevin Levin and the Chimera Sui Generis known as Vilgax.

About a year later, Ben became obsessed with a Conductoid named Feedback, though the form was destroyed by a mutant Galvanic Mechamorph named Malware. Sometime later, he took off the Omnitrix for an unknown reason.

Less than four years, Ben put back on the Omnitrix, which recalibrated and assumed a new form. However, he was forced to destroy the Omnitrix to prevent Vilgax from weaponizing it and obtained the Ultimatrix, an Omnitrix-type device with the ability to evolve his aliens into more powerful forms.

By age 16, Ben became world-famous and was given a second Omnitrix after Azmuth deemed him worthy of it; the one he had used prior was revealed to be a prototype.

Canon Omnitrix Aliens
The following aliens have been used in canon media.

Future Aliens
The following aliens are exclusively available in the Ben 10,000 Timeline.

Dimensional Aliens
The following aliens are exclusively available in other alternate dimensions and timelines, though it is possible they are also available in the Prime Timeline.

Non-Canon Aliens
The following aliens have appeared in non-canon media.

Concept Aliens
The following aliens only exist as names or ideas.

Crossover Aliens
The following aliens have been confirmed to be available in the Omnitrix despite originating from different franchises.