Four Arms is an alien ego of Ben Tennyson from the Ben 10 Media. He is the Omnitrix's DNA sample of a Tetramand from the planet Khoros.
He is voiced by Richard McGonagle in the original series, Dee Bradley Baker in Ultimate Alien and John DiMaggio in Omniverse. Baker also voiced Diamondhead, Water Hazard, Chromastone, Big Chill, Wildmutt, Swampfire, Humungousaur, Jetray, Echo Echo, Spidermonkey, Armodrillo and NRG in the same franchise and Rex in Star Wars: The Clone Wars and Star Wars Rebels.
Four Arms is a four-armed red humanoid alien with four yellow eyes, red spikes on his four muscle arms, three fingers and a thumb on ease hand, and two toes on ease foot. He also has a black stripe goes from his chin to his lower lip. Four Arms wear a white T-shirt with a black line going down it, He also wears black pants and black fingerless gloves. Four Arms wears the Omnitrix Symbol on his upper left shoulder.
Four Arms reappeared in "Ben 10: Ultimate Alien", having an wrestler-like appearance. He now has golden bracelets, a ponytail, two gold sashes that cross over his trunk with the Ultimatrix symbol on the center of his chest, and green eyes instead of yellow.
In "Ben 10: Omniverse", 16-year-old and 11-year-old Four Arms' design resembles a moustached muscle man at a circus, and the Omnitrix symbol is located in his belt.
Four Arms first appeared in Washington B.C., where he defeated Dr. Animo's mutant mammoth and failed to save Gwen from the mutant cockatiel.
In The Krakken, Four Arms pretended to be a sea monster to scare Gwen. He was then attacked by the Krakken but escaped it.
In Kevin 11, Four Arms defeated Tetramand Kevin.
In Tourist Trap, Four Arms played with a giant rubber band ball but accidentally caused some damage all around Sparksville with it.
In The Alliance, Four Arms fought Rojo, her gang and Vilgax's Drones, but had to abandon the fight to take an injured Max to the hospital.
In Lucky Girl, Four Arms tried to save some people at a museum, freed Gwen from some branches, battled the stone statues that Hex had brought to life, and threw the latter into a coffin.
In Side Effects, Four Arms, with a cold, pretended to be a giant bug to scare Gwen. He then saved Councilwoman Liang from some black widow spiders and accidentally destroyed Clancy's home while being attacked by ants.
In Secrets, Four Arms destroyed Vilgax's machine and was about to destroy a drone before the malfunctioning Omnitrix switched him into Ghostfreak.
In The Big Tick, Ben transforms into Four Arms to break the Great One's shell, but Four Arms have no effect on the shell, Four Arms was then knock back by the Great One.
In Framed, Kevin as Four Arms rampaged in a street. Later, Ben as Four Arms fought Kevin's Diamondhead, Heatblast, Stinkfly, himself and Kevin 11.
In Grudge Match, Four Arms briefly battled Technorg before he and Kevin 11 were taken to Slix Vigma and tied together. The two of them then battled Technorg again.
In The Galactic Enforcers, Four Arms fought SixSix and Vulkanus and helped Tini save a falling building.
In Ultimate Weapon, Four Arms saved Gwen and Max from falling and battled Ah Puch.
In Tough Luck, Four Arms saved a bus of elderly people from falling off a cliff.
In Ghostfreaked Out, Four Arms battled Zs'Skayr and the Circus Freaks, and was forced to fight Gwen when she was possessed by Zs'Skayr.
In Back with a Vengeance, Four Arms appeared three times. Firstly, he was seen in a photo. Later, he briefly fought Vilgax and Kevin 11 before switching into XLR8 to save Max and Gwen. Lastly in the Null Void, Four Arms defeated Vilgax's Null Guardian.
In Game Over, Four Arms defended himself from Ishiyama within Sumo Slammers Smackdown.
In Monster Weather, Four Arms battled S.A.M. to no avail until he realized that his only weakness is the loud noise of a guitar.
In Super Alien Hero Buddy Adventures, Four Arms helped Abel North save some people from a falling roller coaster.
In Under Wraps, Four Arms tried to milk some cows.
In The Unnaturals, Four Arms defeated the Squires and Coach Finn.
In The Visitor, Four Arms fought the Mechadroid.
In Ben 10: Secret of the Omnitrix, Four Arms failed to save Gwen from a Florauna tribe.
In Perfect Day, Four Arms defeated Vilgax, sent him to the Null Void and discovered the truth behind his perfect day in a dream.
In Don't Drink the Water, 4-year-old Four Arms escaped the police.
In Ready to Rumble, Four Arms was used for a wrestling tournament and defeated the Immovable Object, Lobster Man, Porcupine and Gaterboy.
In Ben 10 vs. the Negative 10: Part 2, Four Arms battled the Negative 10.
In Ben 10: Destroy All Aliens, Four Arms appeared twice. Firstly, Four Arms attacked Ben in a dream. Then, Four Arms battled Retaliator until the Omnitrix switched him into Upgrade.
In Ben 10,000, Four Arms appeared thrice. Firstly, he fought Dr. Animo twice. Later, he battled Vilgax.
In Ken 10, Four Arms appeared four times. Firstly, he fought Vulkanus before reverting to capture him in a Null Void Egg. Later, he battled Devlin 11. Lastly, he fought Kevin 11,000 twice.
Ben 10: Ultimate Alien
Four Arms returns in Video Games, Ben was suprise when transformed into Four Arms because he never thought that Four Arms was still in the Ultimatrix, SSSerpent used his two mouths (for hands) to attack, but only for Four Arms to grab them with his lower arms and hold SSSerpent in place, thus used his upper arms to pick up and slam two cars into SSSerpent to defeat to cobra-like alien.
In Escape from Aggregor, Four Arms fought Dr. Animo's Yeti before switching into Brainstorm.
In Hero Time, Four Arms defeated Captain Nemesis in a tug of war match.
In Map of Infinity, Four Arms helped Kevin hold up a giant door in Mykdl'dy.
Ben 10: Omniverse
In The More Things Change: Part 1, Four Arms was defeated by Malware.
In Trouble Helix, Four Arms battled Malware but was defeated.
In Many Happy Returns, Four Arms defeated Princess Looma.
In Blukic and Driba Go to Mr. Smoothy's, Four Arms fought Trombipulor.
Powers and Abilities
Four Arms' most prominent ability is his enhanced strength, being able to lift several times his own weight and punch through various resilient materials with ease. Since Four Arms is one of Ben's strongest aliens in the original series, he relied on him the most when fighting large and powerful foes. Technically speaking, Four Arms is physically stronger than Methanosians and Vaxasaurians at base size.
Four Arms' strength allows him to use anything heavy as a weapon, from big rocks he can throw several feet away, to beams and pillars that can be used as clubs. His great strength even extends to his jaws and bite, allowing him to bite metal and damage it. He even develops two sharp fangs between his lower jaws as he gets older. The older Four Arms grows, the stronger he becomes. By age 16, Four Arms has become strong to the point where he was able to overpower Looma Red Wind, the princess of Khoros, despite female Tetramands being generally stronger than their male counterparts.
Four Arms can create strong shockwaves by clapping all four of his hands together. Ben learned this ability from Tini. Four Arms can alternatively create shockwaves by slamming his fists on the ground. Four Arms can jump several times his own height, at least seven stories up, in a single bound. Four Arms has enhanced reflexes, as he was able to catch and redirect missiles in a single motion. Four Arms can climb up walls by pushing his fingers into them to make hand holds.
Four Arms has a high level of enhanced durability due to his tough and thorny skin, being able to casually take missiles from a drone and a slash to the chest from Malware while barely feeling any pain. In correlation to his durable skin, Four Arms is highly resistant to fire, such as that generated by a Pyronite. His skin also makes him laser-proof. When infected with a cold, Four Arms can sneeze out sprays of slimy snot from his mouth, and although disgusting, this can be useful against insects.
- He is completely resembled to the titular anti-hero Hellboy.