Species: Human Homeworld: Earth (Alternate Version) Abilities: Hand-to-Hand Combat Skills Equipment: Omnitrix Appearance: Bad Ben bears a near exact resemblance to Ben Prime, the only differences being color scheme. He has black hair instead of brunette hair, which is natural. He also has mint green-colored eyes, shirt, and an Omnitrix of the same color instead of emerald green. Plus his cargo pants are of a darker brown color and his shoes are black instead of green. Personality: While the other villainous variants of Ben are crooks, bullies, or dictators, this version is pure evil. Bad Ben is cruel, sadistic, abusive, and is well aware of it. As such, he treats it like an art form; from small things. He also speaks slower than Ben Prime and has a twisted sense of humor.

Species: Human Home World: Earth (Alternate Version) Equipment: Negatrix Appearance: Nega Ben wears a black version of Ben Prime's hoodie, pale green trousers, and black shoes. His eyes are grey with black eyeliner under them. His hair covers one of his eyes and is in a choppy style. His Omnitrix, known as the Negatrix, is also colored grey. Personality: Nega Ben possesses an "emo" personality, and is very negative and gloomy. He finds everything to be "lame", although he is by no means inactive, and can still be very vicious and dangerous. Nega Ben's detached and disinterested disposition is such that when Clockwork was about to send him back to his own dimension against his will, all he could do was shrug and mutter, "Whatever-". However, his gloom and apathy are still not absolute.

Species: Human (Altered). Human (formerly). Galvan (formerly; temporarily) Home World: Galvan Prime Abilities; Enhanced Intelligence DNA Alteration Technological Expertise Technology Creation Skilled Hand-to-Hand Combatant Enhanced Reflexes. Equipment: Ultimatrix Appearance: Albedo was transformed into an 11-year-old version of Ben. As such, he wears a red and black version of Ben's old shirt with grey pants, while still having his red eyes and white hair. Personality: Albedo is arrogant, self-centered, ambitious, and bitter. He speaks with a larger vocabulary, being more intellectual than Ben Prime, though in a rather cold and condescending manner. Despite his rude nature, he has shown to have a kind and nice attitude to his allies.

Species: Human Home World: Earth (Mad World) Residence: Benwood (Mad World) Equipment: Power Watch Appearance: Mad Ben closely resembles Ben Prime, but with orange eyes instead of green and a tanned skin tone. His hair is styled in a Mohawk. He wears "Mad Max" style punk clothing, silver hoop earrings on both ears, eye black under his eyes, and an orange and silver spiked Omnitrix called the Power Watch. He has spiked plates on his left shoulder, right hand, and right foot, which are also present on each of his aliens. Additionally, he has a flat plate with orange stripes on his right calf and arm, along with a pouch on his left thigh. He sports a leather vest, orange sleeveless t-shirt, orange-yellow pants, multiple orange wristbands, and gothic shoes. Personality:Mad Ben has an Australian accent and tends to speak in a calm and cool voice. He's extremely bloodthirsty, megalomaniacal, sadistic, spiteful and power-mad towards his subjects in his dimension; he reacts with extreme aggression. He thinks highly of himself as having achieved glory by becoming a tyrannical warlord. He's also very short-tempered and becomes hotheaded when insulted or irritated, which can both serve as his weakness and or making him even more dangerous.

Species: Human (Undead) Home World: Earth (Alternate Version) Status: Undead Equipment: Zombitrix Appearance: Benzarro has a stunted appearance, resembling a zombie. He wears a purple straitjacket with a "10" sewed on the chest, fourteen buckles on it and pants with patches. His body is green with blotches, he has purple eyes and a little purple hair, a long neck, pale yellow teeth, an under bite and animalistic toes. Benzarro wears a purple Omnitrix called the Zombitrix, which is located on a buckle by his elbow on the left straitjacket sleeve and not embedded in his flesh. Personality: Benzarro behaves very primitively, displaying ape-like body movements and dexterity in his human form. Instead of coherent speech, he only yells phrases like, "What we do now?" and "Ben smash!". He also headbutted his Omnitrix to transform, further demonstrating his primitive behavior. However, he is not necessarily completely unintelligent, just backwards

Species: Human (Altered) Home World: Earth (Alternate Timeline) Occupations: Dimensional Traveler. Time Traveler Abilities; Chronokinesis Chronopathy Time Rays Age Acceleration Individual Time Reduction Individual Time Reversal Chronoportation Time Portal Creation Dimensional Travel Dynakinesis Technokinesis (via Dynakinesis) Energy Waves Energy Shields Energy Ball Generation Force Field Generation Shock Wave Generation Materiokinesis Telekinesis Enhanced Strength Enhanced Durability Item Storage Cognitive Projection. Equipment: Energy Sword. Grenades. Appearance: Eon has a black helmet with a purple visor, his face is visible through it. His face appears highly aged or just repulsive; his face is long and frail, greyish skin, dark lines under his eyes, and thin, black lips.: