Four Arms

Four Arms is the Omnitrix’s DNA sample of a tetramand, a warrior race of red, ultra-durable, ultra-strong aliens identified by their immense stature and four arms. Ben first transforms into Four Arms in the second episode to fight a mutated creation of Dr. Animo and uses it frequently as one of his most common alien forms, even as a teen in Ultimate Alien and Omniverse. Initially the primary ‘brick’ alien, his role is later shared with Humungousaur, though each has unique advantages. Four Arms serves as a benchmark for strength in the first four seasons, indicating serious threats if overpowered. While primarily relying on brute force, he demonstrates skill in hand-to-hand combat, enhanced by his extra arms.
Strength
- Sends Kevin flying through multiple overpass support pillars. (source) (B:10 S1E7)
- Punches the ground hard enough to create a fissure that sends Rojo’s crew flying at a distance. (source) (B:10 S1E8)
- Jumps and punches Hex, stopping him from casting a spell. (source) (B:10 S1E10)
- Punches a Gargoyle into a Mausoleum hard enough to collapse it. (source) (B:10 S1E10)
- Breaks wooden supports by ramming into them, collapsing a dilapidated building. (source) (B:10 S1E12)
- Punches Kevin (transformed into Diamondhead) hard enough to gouge a steel bridge underneath him. (source) (B:10 S2E3)
- Punches a small section of a bridge hard enough to make a wave that sends Kevin (as Heatblast) flying. (source) (B:10 S2E3)
- Exchanges blows with the Mayan God of Death, breaking apart sections of a stone temple. (source) (B:10 S2E8)
- Continues exchanging blows with the Mayan God of Death. (source) (B:10 S2E8)
- Dropkicks a Null Guardian. (source) (B:10 S2E13)
- Claps hard enough to send the Weather Monster reeling back. (source) (B:10 S3E10)
- Hits baseballs hard enough to punch through three robots. (source) (B:10 S3E9)
- Pulls a Kool-Aid Man through a wall. (source) (B:10 S3E9)
- Uses a comically large baseball bat to destroy robo-baseball players. (source) (B:10 S3E9)
- Uses a gravity-assisted punch to create a fissure/crater large enough to sink a kaiju into the ground. (source) (B:10 S3E10)
- Shatters the ground by punching it. (source) (B:10 S4E9)
- Collapses a portion of a tunnel and destroys tech by repeatedly punching the wall. (source) (B:SotO)
- Punches a Galvanic Mechamorph suit hard enough to send it over the horizon. (source) (B:DAA)
- Kicks a Stonehenge pillar high into the air. (source) (B:DAA)
- Smashes an opponent into two Stonehenge pillars, then chucks him through four more, cratering him into the ground a significant distance. (source) ([Bold] B:DAA)
- Punches through a wall, exploding it. (source) (Teen Ben B:UA S2E2)
- With his younger self, pushes off the hull of Kevin’s spaceship. (source) (Teen Ben B:UA S2E6)
- Punches into a giant robot, then throws it hard enough to destroy two more robots at a distance. (source) (Teen Ben B:UA S3E5)
- Exchanges blows with another adult male tetramand and is initially overpowered. (source) (Teen Ben B:UA S3E8)
- Punches an elephant-like alien hard enough to crush a car. (source) (Teen Ben B:OV S2E4)
- Cannot punch his way out of a plumber containment cell. (source) ([Limitation] Teen Ben B:OV S4E7)
- Flips over a mutant mammoth. (source) (B:10 S1E2)
- Lifts and spins a mutant mammoth so fast it blurs, then throws it into a nearby wall. (source) (B:10 S1E2)
- Juggles the world’s largest rubber band ball. (source) (B:10 S1E6)
- Supports a wooden pillar and walkway with multiple people on it. (source) (B:10 S1E10)
- Rips tree roots off of Gwen. (source) (B:10 S1E10)
- Lifts a large stone sword and swings it hard enough to shatter it and a Gargoyle. (source) (B:10 S1E10)
- Lifts a large slab of concrete off of himself while sick. (source) (B:10 S1E12)
- Lifts a slab over some civilians. (source) (B:10 S1E13)
- With a female Tetramand, holds up a falling section of a building. (source) (B:10 S2E6)
- Lifts a stone pillar much larger than himself and smashes it on the Mayan God of Death. (source) ([Bold] B:10 S2E8)
- Pulls up a bus right as it’s about to fall off a cliff. (source) (B:10 S2E9)
- Catches and lifts a falling section of a roller coaster. (source) (B:10 S3E7)
- Lifts a cow over his shoulder. (source) (B:10 S3E8)
- Lifts a comically large baseball and throws it hard enough to destroy a robot. (source) (B:10 S3E9)
- Picks up and throws a semi-truck high into the air. (source) (B:10 S3E10)
- Rips a truck from a pool of liquid cement and tosses it aside. (source) ([Bold] B:10 S3E10)
- Holds back a massive robot with its wire. (source) (B:10 S3E13)
- Tears apart a large robot piece by piece. (source) (B:10 S3E13)
- Lifts and punches a Galvanic Mechamorph mech suit that shifted into a large block to crush him. (source) (B:DAA)
- Catches and swings a Stonehenge pillar without much effort. (source) ([Bold] B:DAA)
- Throws a Stonehenge pillar on top of two other pillars. (source) (B:DAA)
- Uproots a tree and uses it to punt Malware into another tree hard enough to break it. (source) (B:OV S1E1)
- Throws Malware a large distance, breaking through a building on landing. (source) (B:OV S1E4)
- Lifts two cars in each secondary arm and sandwiches them on a snake guy. (source) (Teen Ben B:UA S1E4)
- With Kevin’s help, lifts a large stone door, taking visible effort; later holds it up himself briefly before nearly collapsing. (source) ([Limitation] Teen Ben B:UA S2E1)
- Holds up the stone door himself for a short time. (source) (Teen Ben B:UA S2E1)
- Rips and throws down a piece of Tetramand architecture hard enough to crater it into the ground and KO Princess Looma. (source) (Teen Ben B:OV S2E2)
- Rips off a lamp-post and swings it onto an elephant-like alien hard enough to dent it. (source) (Teen Ben B:OV S2E4)
- Throws an armored vehicle hard enough to shatter Benevolon’s forcefield. (source) (Teen Ben B:OV S6E6)
- Crushes two robots, then throws them as frisbees. (source) (B:10 S1E8)
- Hugs a Gargoyle hard enough to crush it. (source) (B:10 S1E10)
- Breaks out of a metal arm restraint, shattering it. (source) (B:10 S1E13)
- Grabs a mook and bullrushes him through a tree and two statues. (source) (B:10 S2E11)
- Throws Vilgax off of himself. (source) (B:10 S2E13)
- Bites hard enough to dent the leg of a robot. (source) (B:10 S3E9)
- Flexes out of restraints from hostile Flourana. (source) (B:SotO)
- Tackles an Upgrade mech suit into the ground hard enough to crater it significantly. (source) (B:DAA)
- Tackles Malware through multiple Galvan buildings in a single leap. (source) (B:OV S1E4)
Speed
- Jumps high and fast enough to catch a flying mutated parrot mid-air. (source) (B:10 S1E2)
- Traverses a city to goons’ hideout by jumping. (source) (B:10 S1E2)
- Carries Max and Gwen over to a hospital. (source) (B:10 S1E8)
- Jumps across a section of the Golden Gate Bridge. (source) (B:10 S2E3)
- Runs across a collapsing roller coaster track. (source) (B:10 S3E7)
- Outruns approaching laser fire and parkours around Stonehenge. (source) (B:DAA)
- Ducks a laser blast from Rojo’s crew. (source) (B:10 S1E8)
- Moves and reacts fast enough to put a jumping Gargoyle into slow-mo. (source) ([Bold] B:10 S1E10)
- Dodges projectile crystals fired from Diamondhead (Kevin). (source) (B:10 S2E3)
- Runs around missiles fired from Six Six. (source) (B:10 S2E6)
- Blocks hair-whips from a mook, then wraps her up in her own hair. (source) (B:10 S2E11)
- Dodges and blocks various lasers fired by a robot. (source) (B:10 S3E9)
- Catches visibly slow rockets. (source) (B:DAA)
- Asserts dominance on a snake guy. (source) (Teen Ben B:UA S1E4)
- Dodges attacks from a robot. (source) (Teen Ben B:UA S3E5)
- Gets outmaneuvered by Esoterica but punches their projectiles out of the air. (source) ([Anti-Feat] Teen Ben B:UA S3E29)
Durability
- Crushes a museum exhibit after being tossed across a room. (source) (B:10 S1E2)
- Falls hard enough on the street to create a crater larger than Ben. (source) (B:10 S1E2)
- Gets thrown across a lake by the Kraken. (source) (B:10 S1E3)
- Takes a punch from Kevin after he copied super strength; they duke it out with him taking more hits. (source) (B:10 S1E7)
- Continues duking it out with Kevin. (source) (B:10 S1E7)
- Gets punched into concrete, then tackled deeper into it. (source) (B:10 S1E7)
- Withstands a laser blast from Rojo’s crew and a gas station exploding. (source) (B:10 S1E8)
- Thrown by a magically levitated wooden support through another support and a wall. (source) (B:10 S1E10)
- Gets hit by the Great One hard enough to send him flying, cratering the ground on impact. (source) (B:10 S2E2)
- Has Stinkfly charge into him, knocking him back. (source) (B:10 S2E3)
- Takes a beatdown from Mutated Kevin, a punch embedding his upper torso into the Golden Gate Bridge. (source) (B:10 S2E3)
- Exchanges blows with the Mayan God of Death, breaking apart sections of a stone temple. (source) ([Bold] B:10 S2E8)
- Continues exchanging blows with the Mayan God of Death. (source) (B:10 S2E8)
- Unphased by missile explosions. (source) (B:10 S3E13)
- Takes a blast from a large robot that obliterates the Rust Bucket. (source) (B:10 S3E13)
- Gets hit by the Forever Ninja hard enough to send him flying into a cliff face. (source) (B:10 S4E9)
- Unharmed after being slammed into the ground by a Galvanic Mechamorph mech suit. (source) (B:DAA)
- Gets knocked into Stonehenge hard enough to topple parts of it. (source) (B:DAA)
- Receives a laser to the face that sends him flying into the air and bouncing off the ground. (source) (B:DAA)
- Takes multiple attacks from Malware, one sending him flying through trees. (source) (B:OV S1E1)
- Gets yeeted up multiple building floors by Yellow Malware. (source) ([Bold] B:OV S1E4)
- Gets punched into a mountainside by the Yeti; later exchanges more attacks and gets punched into the mountain again. (source) (Teen Ben B:UA S1E5)
- Exchanges more attacks with the Yeti. (source) (Teen Ben B:UA S1E5)
- Gets slammed into concrete by Alpha. (source) (Teen Ben GR:HU)
- An elephant-like alien tackles him through a wall. (source) (Teen Ben B:OV S2E4)
- Takes multiple blasts of fire from Heatblast (Kevin). (source) (B:10 S2E3 Heatblast RT: https://old.reddit.com/r/respectthreads/comments/kb7hlw/respect_heatblast_ben_10_original_continuity/)
- Isn’t adversely affected by the atmosphere of Mykdl’dy’s night side, which is 320 degrees below zero. (source) (B:UA S2E1)
Scaling
- Matches Kevin and exchanges blows after Kevin copied his super strength. (source) (B:10 S1E7)
- Overwhelms Diamondhead (Kevin) in a fistfight. (source) (B:10 S2E3 Diamondhead RT: https://www.reddit.com/r/respectthreads/comments/kkf3tg/respect_diamondhead_ben_10_original_continuity/)
- Takes on Vulcanus with striking strength. (source) (B:10 S2E6)
- Weaker than Ultimate Aggregor, getting overpowered physically. (source) ([Limitation] B:UA S2E6)
- Exchanges blows with Malware and isn’t scratched by his claws. (source) (B:OV S1E4 Malware RT: https://www.reddit.com/r/respectthreads/comments/agd03y/respect_malware_ben_10_omniverse/)
- Disadvantaged in a tug-of-war against Captain Nemesis using two arms, but wins using four. (source) (Teen Ben B:UA S1E9)
- Throws Rex hard enough to shatter one of his Smack Hands against Alpha. (source) (Teen Ben GR:HU Rex RT: https://www.reddit.com/r/respectthreads/comments/52hnci/respect_rex_salazar_generator_rex/)
- Matches a punch from Princess Looma, sending her into a stadium wall to crater it; continues fistfighting her on equal ground. (source) (Teen Ben B:OV S2E2 Looma RT: https://www.reddit.com/r/respectthreads/comments/7dfe6l/respect_looma_red_wind_ben_10_omniverse/)
- Continues fistfighting Princess Looma on relatively equal ground. (source) (Teen Ben B:OV S2E2)
Other
- Four Arms’ Transformation Sequence. (source)
- Ultimate Alien version transformation. (source)
- Tetramands are weak to electrical attacks; incapacitated by a shock collar. (source) (B:10 S2E5)
- Taken out briefly by Six Six’s electrical grenade. (source) (B:10 S2E6)
- Scales walls by jamming fingers into them. (source) (B:10 S2E11)
- Ghostfreak cannot possess or merge with Ben when transformed. (source) (B:10 S2E11)
- Resists exposure to Corrodium, which mutates living things. (source) (B:10 S3E8)
- Can play two guitars at once. (source) (B:10 S3E10)
- Knows how to grapple and wrestle. (source) (B:10 S4E6)
- Has a utility belt with a pocket for his phone. (source) (Teen Ben B:OV S4E3)