This Villain was proposed and approved by Villains Wiki's Pure Evil Proposals Thread. Any act of removing this villain from the category without a Removal Proposal shall be considered vandalism (or a futile "heroic" attempt of redemption) and the user will have high chances of being terminated blocked. You cannot make said Removal Proposal without permission from an admin first.
Additional Notice: This template is meant for admin maintenance only. Users who misuse the template will be blocked for a week minimum.

Not everyone's relationship to the nanites is as... cooperative as yours. For example, my body is unstable. I need a constant supply of fresh nanites to survive. Yours should be particularly nourishing!
~ Van Kleiss
Septimius Severus: Are you a man or a God?
Van Kleiss: I find both labels rather limiting. Now you are going to give me everything I require, starting with a quiet place to work. I, in return, shall ensure the growth and security of your reign as emperor. You may call me Van Kleiss.
~ Van Kleiss showing how high he truly thinks of himself
Truth, doctor? You wouldn't know the first thing about it, nor loyalty for that matter. How many times must I tell you this, Rex? The answers you so desperately seek, lie with me. And as for you, doctor, consider our past disagreement settled. I look forward to continuing our research...alone. This was unavoidable, Rex. The longer you resist me the more people get hurt.
~ Van Kless to Rex, after severely injuring Dr. Rylander.

Van Kleiss is the secondary antagonist of the animated series Generator Rex. He is the main antagonist of the first and second season and a major antagonist during the third. He is able to control his nanites like Rex, except his mutation is unstable and requires a constant supply of fresh nanites, causing his victims to petrify in the process.

He is voiced by Troy Baker.



In the past, Van Kleiss was present during the nanite incident. He was power hungry and never cared about others but for himself, wanting to obtain all the power with the help of the nanites and seeks to create a planet populated entirely by E.V.O.s. It's also revealed that he killed Rex's parents after the incident happened after discovering the same thing. This was due to him realizing that the Consortium had also the same objective like him.


With the Pack as his enforcers, he established a domain called Abyssus at the original site of the nanite explosion and has nanites seeded for miles in the area. As a result, he can control everything in his sphere of influence, and even regenerate completely from the ground if his body is destroyed. He has an extensive knowledge about the nanites, apparently having worked on or been familiar with the experiment which released them, and about Rex's past.

He is killed in the episode "Dark Passage" while attempting to secure Dr. Gabriel Rylander's nanite laboratory but was resurrected in "What Lies Beneath" when Rex had to resurrect him with a machine when Abysus was becoming unstable. Rex cured him shortly thereafter.

In doing so, however, Rex gave Van Kleiss the means to study his nanites, which Van Kleiss then stole. With Rex's nanites, Van Kleiss gained the new power to create E.V.O.s simply by touching his victim, which passes them a unique mark. It is said that E.V.O.s created by Van Kleiss has their nanites extremely unstable, meaning that the transformation will eventually be permanent if not cured.

In "End Game" Pt. 2, during the final cure, Van Kleiss is dragged by Breach into one of her wormholes. His fate is still unknown.

The Pack

  • Biowulf (voiced by Troy Baker) - A blue-armored, white-haired, werewolf-like E.V.O. with superhuman abilities that is fiercely loyal to Van Kleiss. Due to Van Kleiss' powers being limited to his native soil, Biowulf acts as the Pack's de-facto leader in the field. He was captured in Payback, but busted out in between Season 1 and Season 2, presumably by Breach.
  • Skalamander (voiced by John DiMaggio) - A large humanoid lizard-like E.V.O. with crystal spikes growing out of his body, four short stubby legs and a crystal club growing out of his left arm. His head also appears to be permanently twisted to its side. He can fire spikes out of the club or grow it into a shield. In Payback, Skalamander took part in Van Kleiss' attack on Providence. He had Dr. Holiday cornered until she unleashed her sister on him. He was presumably captured and later busted out by Breach.
  • Breach (voiced by Hynden Walch) - A disturbed black-haired female E.V.O. with four arms where the higher pair has oversized forearms. She has the ability to create portals of varying shapes and sizes for multiple purposes. Of all the Pack members, she speaks the least and acts on her own whims. She also uses a pocket dimension to hold a city she stole, which she uses to store her "toys" (referring to anything she liked, i.e., art, stolen property, E.V.O., etc.). Breach is obsessed with everything in this dimension being "neat", it being the only way she to maintain her sanity. In Breach, she attempted to trap Rex, but this backfired when Rex went on a rampage after learning of her obsession with cleanliness. In doing so, he drove Breach mad, causing her to collapse in on herself, allowing him to escape in the chaos. She eventually recovered returning in What Lies Beneath to rescue Van Kleiss at the last minute. Breach later took part in Van Kleiss' attack on Providence Base where she planted bombs throughout the base. Though Rex managed to disarm the bombs, Breach got away. Breach later stole a reactor core bound for Providence while Van Kleiss was fighting Rex.
  • Circe (voiced by Tara Sands) - Introduced in Beyond the Sea during Rex's trip to Cabo Luna, Circe is a female E.V.O. with black and red hair whose powers only manifest when active like Rex's. When activated, her mouth prolapses into a tube which she can use to project destructive sonic pulses, which also attract some other E.V.O.s to her. She is also skilled in kung fu. She tells Rex she has joined up with the Pack because she feels like too much of an outsider anywhere else, though Rex constantly tries to get her to switch sides. Van Kleiss acknowledges her friendship with Rex and allows her to join the Pack even though Rex had helped her in her initiation of defeating a sea monster E.V.O. He implies that he intends to use her to get to Rex. Rex has feelings for her, and she seems to reciprocate them, as evidenced by when they almost share a kiss, although Rex puts defeating Van Kleiss first over their relationship. Despite that Circe was almost left for dead by Van Kleiss when he bargained Rex to join the Pack or let his closest friends die in What Lies Beneath, Circe still remains with the Pack. After the events in Alliance, Circe strikes out on her own after Van Kleiss forbids her from helping Rex against NoFace.


To be Added...

External links



           Cartoon Network 2010 logo Villains

Code Loyko
XANA | Scyphozoa | Men in Black | William Dunbar

TV Movie Villains
Albadon | Astaroth | Troy Adams | Steve | Big Rob | Whitey | Spinel | Mr. Ross | Future Mordecai | Rigby | Muscle Man | Benson Dunwoody | Grandfather | Father | Senior Citi-zombies | Agent Trout | National Wildlife Control

Crossover Villains
The Announcer's Remote Control | Delightful Reaper | Alpha | Strike

What A Cartoon!
Yuckie Duck | Sledgehammer O'Possum | Dogg | Big Bad Wolf | Wind Up Wolf | Luther | Fox Chef| French Chef | Tumbleweed Tex | Noof| Mad Bomber | Reilly (What A Cartoon) Blammo the Clown | Boid | Aliens |

Dexter's Laboratory
Mandark | Quackor | Crazy Robot | Badaxtra | Hookocho | Lalavava | Comrade Red | Mental Mouse | Huntor | Peltra | Simion | Orgon Grindor | Dynomutt X-90

Foster's Home for Imaginary Friends
Terrence | Bendy | Berry | Kip Snip | Lil' Lincoln | Nemesis | Omnizot | World

Ed Edd n' Eddy
Kevin | Sarah | Kanker Sisters | Belly Button Eater | Eddy's Brother | Ed's Hallucinations | Lemon Brook Lumpers

Grim Adventures of Billy & Mandy
Grim | Mandy | Nergal | Eris | Mindy | Bogeyman | Jack O' Lantern | Pinocchio | Geppetto | Cthulhu | Morg | Bunny | Delightful Reaper | Bun Bun | Pan-dora | Hoss Delgado | Hector Con Carne | General Reginald Skarr | Brain-Eating Meteor | Mask of the Beast | Lord Moldybutt | Major Doctor Ghastly | Lionel Van Helsing | Nancy Claus | Estroy | John Jack Daniel Torrance | Wiggy Jiggy Jed | Yaap Yaap | Triceratron | Clowns | Lord Pain | Professor Death Ray Eyes | New Mandy | Super Chicken | Dreadbots | Arachnotaur | Velma Green the Spider Queen

Hi Hi Puffy AmiYumi
Axel & Rod Skidmark | Eldwin Blair | Mr. Darrell | Mr. Master | P.A.L. | Rumaki | Sunekura | Sauerkraut Malone | Julie

The Life & Times of Juniper Lee
Auntie Roon | Auntie Roon's Minions | Loki | Thor | Demoness | Jonathan | Kai Yee | Lex | Sandman | Vikki Devvyne | Taylor Evermore | Wrongness

Camp Lazlo
Edward Platypus | Commander Hoo-Ha | Ms. Mucus | Edward's Brothers | Chip & Skip | Gretchen | Meatman | Timmy and Tommy | Cousin Sinkbug | Aliens | Clowns | Conjoined Pigs | Beastly Bumblepuss | Cheese Obsessed Canadian Trouts | Elebug | Lake Monster

My Gym Partner's a Monkey
Bobby Lion | Bull Sharkowski | Chad | Euripides Sharkowski | Larry Raccoon | Lola Llama | Possum Girl | Principal Wolverine | Rick Platypus | Mr. Cheetah | The Spiffies | The Ferals | Ted Oxpecker

Miss Endive | Gorgonzola | Reuben | Chestnut | Funjl | Meaches | Gumbo | Mr. Fugu | King of the Sky | Sour Ron | Kevin | Frank | Scary | Puckerberry Overlords | Sour Wife | Rosemary | Cinnamini Monster | Weirdos | Frau Broten | Florentine | Jeffrey | Peking Duck | Jam | Mr. Samball | Robert Limburger | Pepperjack | Flendive | Crazy Fruit | Meanie Cream Cake | Mold Pixie | Steve | The Teriyaki Triads | Roquefort | Ms. Butterscotch

Johnny Test
Bling-Bling Boy | Wacko | Mr. Mittens | Brain Freezer | Zizrar the Mole King | The Beekeeper | Dark Vegan | Bumper Randalls | Road Burn | Mutant Agents | Miss X and Miss Z | Robot Johnny & Dukey | Evil Johnny | Sissy Blakely | Blast Ketchup | The Tickler | Moon Fiends | Lunch Lady | Mr. Henry Teacherman | Monty Butterworth | Fluffybuns | Dr. Swampbrain | King Fufassel

The Secret Saturdays
V.V. Argost | Munya | Argost's Army | Zak Monday | Doc Monday | Drew Monday | Fiskerton Monday | Zon Monday | Abbey Grey | Baron Finster | Francis | Shock Troopers

We Bare Bears
Nom Nom | Dave | Ralph | Barry Charles | Wolves | Cory | Ari Curd | Andrew Bangs| Barry's Robots | Techies Club | Pigeon Cartel | Ragtag Kids | Saanvi Patel | Homewrecker | Kyle | Pet Shoppe Owner | Lewis | Lucille | Mad Scientist | Agent Trout

The Looney Tunes Show
Cecil Turtle | Yosemite Sam | Elmer Fudd | Marvin the Martian | Wile E. Coyote | Sylvester | Taz | Daffy Duck | Henery Hawk | George P. Dog

New Looney Tunes
Yosemite Sam | Ivana | Rhona Roundhouse | Carl the Grim Rabbit | Elmer Fudd | Marvin the Martian | King Thes | Cal | Jack | Eagle Scout | Hazmat | Count Bloodcount | Sir Littlechin | Computer Virus | Winter Stag | Krakos the Polar Bear | Scarecrow | Vera the Vulture | Ninjas

Mighty Magiswords
Queen Porcina | Morbidia | Gateux | Phil The Pilefer | Glori | Nohyas | King Rexxtopher | DeBizz | Helmut | Manfish the Fish Man | Frostferatu | Brocoli Dumplin Kids | Brotherhood of Thieves | Francis Thingshooter | Naso | Birda | Purrlance | Mr. Flumooks

Over the Garden Wall
The Beast | Adelaide

Belson Noles | Balance | Brenda Shoop | Joshua | Mildred | Cooter | Malakevin | Carol Moody | Mr. Noles | Seabass

Uncle Grandpa
Pizza Steve | Aunt Grandma | Cheesepuff Mike | Bottom Bag | Chinease Take Out Delivery Guy | Christopher Columbus | Cloud Wizard | Curly | Emperor Krell | Evil Forces Shadow Guy | Foreign Madman | Free Sample Elves | Galaxy Guardians | Gary | G-Dog | Gornak | Green Alien | Jimmy | Kevin E. Peepants | Kid Cousin | Larry | Larry | leo | Lexus, Lisa, & Lori | Moe | Mouse | Mole People | Mooon Man | Mud Goblins

Generator Rex
Black Knight | Van Kleiss | The Pack ( Biowulf , Breach , Skalamandar, Bouncer, I-Bol & Circe ) | Consortium

Annoying Orange
Broccoli Overlord | Broccoli Minions | Grapefruit | Big Rock Candy Monster | Teddy Juicer

Apple & Onion
Beef Jerky | Cheesesteak | Duck | Maritimers (Crab Cake, Tempura Shrimp & Tuna Can)

Craig of The Creek
The King | Carter Brown | Junk Lord | Big Red | Brigid | Jerry | Eliza | Jane | Tea Timers | Turner | Maya | Cherry Blossom | Acorn Knight

Summer Camp Island
Susie | Alice | Basketball | Jabberwock

Black Hat Organization (Black Hat, Dr. Flug Slys & Demencia) | Penumbra

Infinity Train
The Conductor | Steward | The Cat | Special Agent Mace | Agent Sieve | Marcel | Grace | Simon | The Apex

Dr. Kamikazi | Constantine | Special Agent | Bjorn Bjornson | Bjornbot | Protoboy | General Yakitori | Klaus Von Affenkugel | Ludwig | Felonious Hexx | Donnie Turnbull | Kurt | Stu | Mookie | Brainy Yak | Dr. Freeman Coldpepper | Mr. Yaschinshki | Ronald Rump | Robotman | Agent Kalaschnikov | Mona Lethal | Gilbert | Stevie

See Also
Adventure Time Villains | Ben 10 Villains | KND Villains | OK K.O Villains | Powerpuff Girls Villains | Regular Show Villains | Samurai Jack Villains | Steven Universe Villains | Teen Titans Villains | Teen Titans Go! Villains | The Amazing World of Gumball Villains | The Powerpuff Girls Villains | Total Drama Villains

Community content is available under CC-BY-SA unless otherwise noted.