When Ben gets the power to turn into aliens, he finds superheroing is trickier than he thought. Yet no matter what bizarre form Ben takes, he's still the same good-hearted yet mischievous 10-year-old.
Whenever Ben is ready to dive headfirst into trouble, his 10-year-old cousin Gwen is the voice of reason, always trying to think ahead, plan and calculate the consequences.
Grandpa Max was in the galactic defense force the Plumbers and has been through his share of scrapes, so he takes it all in stride when Ben gains superpowers, and he supports Ben any way he can.
Cannonbolt can curl up within the thick armor on his back and become an unstoppable wrecking ball, launching himself at high speeds and ricocheting off solid objects to cause massive damage.
XLR8 is a dinosaur-like alien with lightning-quick reflexes and the ability to reach speeds in excess of 300 mph. He can also run up sheer walls and across non-solid ground like mud, ice and water.
More plant than animal, he can root himself into the ground, stretch out his vines to snare bad guys, and launch explosive spore pods! Unfortunately, he's weak to poisons and needs sunlight to thrive.
More animal than humanoid, Wildmutt is a beastly alien with superhuman athletic ability and heightened senses of smell, hearing and taste. He can also fire the quills from his back as projectile weapons.
Way Big is the biggest being in Ben's arsenal. Reaching nearly 100 feet from head to toe, he towers over everything in his way with enough size and power to take out an entire army!
A living machine with liquid metallic skin, Upgrade is a biomechanical alien that can merge with any mechanical device and "upgrade" the device into an incredible piece of Ultra-Tech.
Upchuck can use his four long, sticky tongues to grab and devour practically anything. Then he can fire the resulting energy out of his mouth with pinpoint accuracy and explosive force.
Stinkfly is a winged insectoid alien and expert flyer, able to pull off amazing acrobatic moves in midair. He can also use his pincers and sharp tail as impressive natural weapons.
Ripjaws is an extraordinary swimmer, able to breathe underwater and change his legs into a large tail. He's remarkably fast and agile and can unhinge his powerful jaws to deliver a devastating bite.
Heatblast comes from an alien race that lives on a sun rather than a planet. He can throw fireballs or absorb both flames and heat, meaning he can put out a fire just as quickly as he can start one.
At a mere five inches tall, Grey Matter is an alien bred to enter complex machines and repair them from the inside. Consequently, he can squeeze through tiny spaces, and he's extremely smart.
Ghostfreak is a shadowy alien with ghost-like powers, able to phase through walls and turn invisible. His ghastly appearance is also good for putting fear into the hearts of criminals everywhere.
Standing twelve feet tall, Four Arms is a formidable four-armed alien who can use his tremendous strength to dish out the punishment, while his armored skin protects him from harm.
Eye Guy is covered in eyes of every shape and size. He may look odd, but he can fire a devastating energy blast from the huge central eye on his chest.
Diamondhead is a crystalline alien whose body is harder than diamond, making him invulnerable to most physical attacks and allowing him to cut and slash through almost anything.
Ben 10 Characters
It's hero time! Learn about Ben's Omnitrix full of alien heroes, play online games and watch full episodes and free videos from Ben 10 on Cartoon Network.