Heatblast in Race Against Time
Young Heatblast in Ultimate Alien
Heatblast in Destroy All Aliens
Young Heatblast in Omniverse
Heatblast in Ultimate Alien
Heatblast's cameo in Heroes United
Wildmutt in Race Against Time
Young Wildmutt in Ultimate Alien
Wildmutt in Destroy All Aliens
Young Wildmutt in Omniverse
Wildmutt in Ultimate Alien
Wildmutt's cameo in Heroes United
Ben 23 as Dog-Nabbit (His version of Wildmutt)
Diamondhead in Race Against Time
Diamondhead in Destroy All Aliens
Young Diamondhead in Omniverse
Diamondhead in Alien Force and Ultimate Alien
Diamondhead in Heroes United
Ben 10,000 as Diamondhead
Diamondhead in the reboot
Diamondhead in the reboot episode Don't Laze Me, Bro
Omni-Enhanced Diamondhead
XLR8's cameo in the Ultimate Alien opening
Ben 23 as Speedyquick (His version of XLR8)
Grey Matter in Race Against Time
Grey Matter in Destroy All Aliens
Young Grey Matter's cameo in the Omniverse opening
Grey Matter's cameo in the Ultimate Alien opening
Ben 23 as Brainfrog (His version of Grey Matter)
Grey Matter in the reboot
Omni-Enhanced Grey Matter
10 Year-Old Four Arms in Ben 10
Four Arms in the episode Game Over
Young Four Arms in Ultimate Alien
Young Four Arms in Destroy All Aliens
Young Four Arms in Omniverse
16 Year-Old Four Arms in Ultimate Alien
16 Year-Old Four Arms in Heroes United
16 Year-Old Four Arms in Omniverse
Ben 23 as Handy Man (His version of Four Arms)
Stinkfly in the Original Series
Young Stinkfly in Ultimate Alien
Stinkfly in Destroy All Aliens
Young Stinkfly in Omniverse
Stinkfly's cameo in the Ultimate Alien opening
Stinkfly's cameo in Heroes United
Ben 23 as Big Bug (His version of Stinkfly)
Ripjaws with legs in the original series
Ripjaws with a tail in the original series
Young Ripjaws' cameo in the Omniverse opening
Ben 23 as Fish Fingers (His version of Ripjaws)
Ben 23 as Techno-Bubble (His version of Upgrade)
Ben 23 as Rollaway (His version of Cannonbolt)
Ben 23 as Freezelizard (His version of Arctiguana)
Ben 23 as Vomit Man (His version of Upchuck)
Ben 23 as Lightning Volt (His version of Frankenstrike)
Ben 23 as Giant-Manster (His version of Way Big)
Ben 23 as Mr. Mucky (His version of Swampfire)
Ben 23 as Dino-Mighty (His version of Humungousaur)
Ben 23 as Freezeghost (His version of Big Chill)
Ben 23 as Mr. Monkey (His version of Spidermonkey)
Ben 23 as Muck-A-Muck (His version of Goop)
Ben 23 as Tigerizer (His version of Rath)
Ben 23 as Toolboxx (His version of Armodrillo)
Ben 23 as Windy-Hindy (His version of Clockwork)
Ben 23 as Electricyeti (His version of Shocksquatch)
Silhouette of Ben 23's Feedback
Ben 23 as Build-A-Guy (His version of Bloxx)
Silhouette of Ben 23's Orbit Man (His version of Gravattack)
Ben 23 as Nighty Knight (His version of Pesky Dust)
Ben 23 as Bat-Dude (His version of Whampire)