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. 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.

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.

Unlocked at Age 10

 * Heatblast (Pyronite)
 * Wildmutt (Vulpimancer)
 * Diamondhead (Petrosapien)
 * XLR8 (Kineceleran)
 * Grey Matter (Galvan)
 * Four Arms (Tetramand)
 * Stinkfly (Lepidopterran)
 * Ripjaws (Piscciss Volann)
 * Upgrade (Galvanic Mechamorph)
 * Ghostfreak (Ectonurite)
 * Cannonbolt (Arburian Pelarota)
 * Wildvine (Florauna)
 * Blitzwolfer (Loboan)
 * Snare-oh (Thep Khufan)
 * Frankenstrike (Transylian)
 * Perk Upchuck (Perk Gourmand)
 * Ditto (Splixson)
 * Eye Guy (Opticoid)
 * Way Big (To'kustar)

Unlocked at Age 11

 * Feedback (Conductoid)
 * Arctiguana (Polar Manzardill)
 * Spitter (Sphoeroid)

Unlocked at Age 15

 * Swampfire (Methanosian)
 * Echo Echo (Sonorosian)
 * Humungousaur (Vaxasaurian)
 * Jetray (Aerophibian)
 * Big Chill (Necrofriggian)
 * Chromastone (Crystalsapien)
 * Brainstorm (Cerebrocrustacean)
 * Spidermonkey (Arachnichimp)
 * Goop (Polymorph)
 * Alien X (Celestialsapien)
 * Murk Upchuck (Murk Gourmand)
 * Lodestar (Biosovortian)
 * Nanomech (Human/Nanochip hybrid)
 * Rath (Appoplexian)

Unlocked at Age 16

 * Water Hazard (Orishan)
 * AmpFibian (Amperi)
 * Armodrillo (Talpaedan)
 * Terraspin (Geochelone Aerio)
 * NRG (Prypiatosian-B)
 * Fasttrack (Citrakayah)
 * Clockwork (Chronosapien)
 * Chamalien (Merlinisapien)
 * Shocksquatch (Gimlinopithecus)
 * Eatle (Oryctini)
 * Juryrigg (Planchaküle)
 * Bloxx (Segmentasapien)
 * Gravattack (Galilean)
 * Crashhopper (Orthopterran)
 * Ball Weevil (Insectoid)
 * Walkatrout (Ickthyperambuloid)
 * Pesky Dust (Nemuina)
 * Mole-Stache (Unknown)
 * The Worst (Atrocian)
 * Kickin Hawk (Unknown)
 * Toepick (Unknown)
 * Astrodactyl (Pturbosaurian)
 * Bullfrag (Incursean)
 * Buzzshock (Nosedeenian)
 * Atomix (Unknown)
 * Gutrot (Unknown)
 * Whampire (Vladat)
 * Rocks (Basalt)
 * Squidstrictor (Cephalod-ae)
 * Ventrilosquid (Unknown)

Confirmed at Exist

 * Overflow (Cascan)
 * Shock Rock (Fulmini)
 * Slapback (Ekoplektoid)
 * Decagon Vreedle (Vreedle)
 * Shellhead (Unknown)
 * Snakepit (Unknown)
 * Sandbox (Unknown)
 * Unnamed Ben-like form (Human)
 * Unknown (Chimera Sui Generis)
 * Unknown (Osmosian)
 * Unknown (Unknown)
 * Unknown (Interdimensional white lab mouse)
 * Unknown (DNAlien)

Non-Canon

 * Eon (Chronian)
 * Bob the Blob (Unknown)
 * Antigravitesla (Unknown)
 * Plantapocalypse (Unknown)
 * Portaler (Unknown)