Ben 10 Fan Fiction Wiki
Ben 10 Fan Fiction Wiki

The series follows on 16-year old Ben and Gwen along with a 17-year old Kevin. Ben's secret identity has been revealed to the world and he is now an international mega-star super hero, loved by kids all-over the world, but distrusted by many adults such as reporter Will Harangue. Armed with a mysterious, more powerful Omnitrix called the Ultimatrix, Ben will face being hunted by rogue alien threats, human mercenaries, and assassins hired by opposing adults.


  • Ben Tennyson (Yuri Lowenthal) - revealed to be a descendent of John Smith
  • Gwen Tennyson (Ashley Johnson (Robot), later, Tara Strong (Real one))
  • Kevin Levin (Scott Wenger)
  • Elena Validus (Jessica DiCicco) in season 4
  • Grandpa Max (Paul Eiding)
  • Julie Yamamoto (Vvyan Pham)
  • Alan Albright (Zeno Robinson)
  • Cooper Daniels (Chris Pratt)
  • Jimmy Jones (Scott Menville)
  • Azmuth (Jeff Bennett)
  • Paradox (David McCallum)
  • Colonel Rozum (John DiMaggio)
  • Ship (Vvyan Pham)
  • Charmcaster (Kari Wahlgren)
  • Bivalvan (Dee Bradley Baker)
  • Galapagus (John DiMaggio)
  • P'andor (Dee Bradley Baker)
  • Andreas (Dee Bradley Baker)
  • Ra'ad (Dee Bradley Baker)
  • Oliver Thompson (Peter MacNichol)
  • Baz-El (Rob Paulson)
  • Verdona Tennyson (Juliet Landau)
  • Sir George (Peter Renaday)
  • Winston (Patrick Cavanaugh)
  • Squire (Greg Ellis)


  • Season 1:
    • Aggregor (John DiMaggio) - the main antagonist
    • Forever Knights:
      • Urien (Jim Piddock)
      • Sir Dagonet (Greg Ellis)
    • Zombozo (John DiMaggio)
    • Vulkanus (John DiMaggio)
    • Rojo (Kari Wahlgren)
    • Sevenseven (Dee Bradley Baker)
    • Ssserpent (Dee Bradley Baker)
    • Will Harangue (John DiMaggio)
    • Dr. Aloysius James Animo (Dwlight Schultz)
    • Buzz (Yuri Lowenthal)
    • Hammer (Fred Tatasciore)
    • Surgeon (Fred Tatasciore)
    • Argit (Alexander Polinsky)
    • Captain Nemesis/Overlord (Christopher MacDonald)
    • Psyphon (Dee Bradley Baker)
    • Adwaita (John DiMaggio)
    • Ultimate Kevin (Greg Cipes)
    • Morgg (Xander Berkley)
  • Season 2:
    • Sunder (Powers Boothes)
    • King Viktor (Peter Stormore)
    • King Xarion (Peter Stormore)
    • Sevenseven (Dee Bradley Baker)
    • Will Harangue (John DiMaggio)
    • Sunny Tennyson (Ashley Johnson)
    • Antonio (Jason Marsden)
    • Elena Validus/The Queen (Tia Texada)
    • Forever Knights:
      • Sir George (Peter Reneday)
      • Urien
      • Driscoll (Richard Doyle)
      • Patrick
      • Enoch
      • Sir Cyrus (Robin Atkin Downes)
    • Kolar (James Arnold Taylor)
    • Trumbipulor (Dee Bradley Baker)
    • Dr. Aloysius James Animo (Dwlight Schultz)
    • Eon (Yuri Lowenthal/Sean Donnelan)
    • Prisoner #775 (Dee Bradley Baker)
    • Mizaru (Jon Polito)
    • DNAliens
    • Vulkanus (John DiMaggio)
    • Vilgax (James Remar)
    • The Flame Keeper's Circle:
      • Conduit Edwards (John DiMaggio)
    • Albedo (Yuri Lowenthal)
    • Ssserpent (Dee Bradley Baker)
    • Sentient Ultimate Swampfire (Dee Bradley Baker)
    • Sentient Ultimate Echo Echo (Dee Bradley Baker)
    • Sentient Ultimate Humungousaur (Dee Bradley Baker)
    • Sentient Ultimate Big Chill (Dee Bradley Baker)
    • Sentient Ultimate Spidermonkey (Dee Bradley Baker)
    • Sentient Ultimate Cannonbolt (Dee Bradley Baker)
    • Evil Unitrix (Jeffery Combs) - the main antagonist of the 2-part season 3 finale
    • Garbage Monster (Kevin Grievoux)
    • Vreedle Brothers (Rob Paulson and John DiMaggio)
    • Ma Vreedle (Diane Delano)
    • Vilgax (James Remar)
    • The Flame Keeper's Circle:
      • Diagon (John DiMaggio)
      • Conduit Edwards (John DiMaggio)
      • Vilgax (James Remar) - the new master of the Estorica
    • Forever Knights:
      • Sir George (Peter Reneday)
      • Sir Urien (Jim Piddock)
      • Sir Driscoll (Richard Doyle)
      • Patrick (Michael York)
      • Enoch (Richard Doyle)
      • Sir Cyrus (Robin Atkin Downes)
    • Inspector #13 (Dee Bradley Baker)
    • Hex (Khary Payton)
    • Adwaita (John DiMaggio)
    • Charmcaster (Kari Wahlgren)
    • Elena Validus/The Queen (Tia Texada)
    • Clancy/The King (Corey Burton)
    • Aggregor (John DiMaggio)
    • Van Kleiss (Troy Baker)
    • Carl Nesmith (Christopher MacDonald)
    • Jennifer Nocturne (Tara Platt)
    • Dr. Aloysius James Animo (Dwlight Schultz)
    • Psyphon (Dee Bradley Baker)


  1. Heatblast (Dee Bradley Baker, later Steven Blum)
  2. Wildmutt (Dee Bradley Baker, later Frank Welker)
  3. Diamondhead (Dee Bradley Baker, later Clancy Brown)
  4. XLR8 (Dee Bradley Baker, later Carlos Alazraqui)
  5. Grey Matter (Tom Kenny)
  6. Fourarms (Dee Bradley Baker, later Richard McGonagle)
  7. Stinkfly (John Kassir)
  8. Ripjaws (Dee Bradley Baker, later Fred Tatsciore)
  9. Upgrade (Yuri Lowenthal)
  10. Ghostfreak (Jeff Bennett, later Steven Blum)
  11. Cannonbolt (Dee Bradley Baker, later Fred Tatasciore)
  12. Wildvine (Jim Cummings)
  13. Benwolf (Troy Baker)
  14. Benmummy (Richard Green)
  15. Benviktor (Michael Dorn)
  16. Upchuck (Dee Bradley Baker, later Dave Wittenberg)
  17. Ditto (Rob Paulson)
  18. Eye Guy (Kevin Grievoux)
  19. Way Big (Dee Bradley Baker, later Fred Tatasciore)
  20. Buzzshock (Tara Strong)
  21. Swampfire (Dee Bradley Baker, later Ogie Banks)
  22. Echo Echo (Dee Bradley Baker, later Kath Soucie)
  23. Humungousaur (Dee Bradley Baker, later Kevin Michael Richardson)
  24. Jetray (Dee Bradley Baker, later Dwight Schultz)
  25. Big Chill (Dee Bradley Baker, later Mark Hamill)
  26. Chromastone (Dee Bradley Baker, later Jimmy Zoppi)
  27. Brainstorm (Dee Bradley Baker, later Corey Burton)
  28. Spidermonkey (Dee Bradley Baker, later Frank Welker)
  29. Goop (Dee Bradley Baker, later John Kassir)
  30. Alien X (Yuri Lowenthal)
  31. Lodestar (Dee Bradley Baker, later Nolan North)
  32. Rath (John DiMaggio, later Frank Welker)
  33. Nanomech (Dee Bradley Baker, later Jeff Bennett)
  34. Water Hazard (Dee Bradley Baker, Keith Szarabajka)
  35. Terraspin (Dee Bradley Baker, Bill Fagerbakke)
  36. NRG (Dee Bradley Baker, Jim Ward)
  37. Armodrillo (Dee Bradley Baker, Michael Dangerfeild)
  38. Ampfibian (Dee Bradley Baker, Frank Welker)
  39. Fasttrack (Dee Bradley Baker, Ian James Corlett)
  40. Clockwork (Dee Bradley Baker, Patrick Warburton)
  41. ChamAlien (Dee Bradley Baker, Jim Ward)
  42. Eatle (Dee Bradley Baker, S.Scot Bulluck)
  43. Shocksquatch (Dee Bradley Baker, Frank Welker)
  44. Jury Rigg (Dee Bradley Baker, John Kassir)
  45. Blox (Bumper Robinson)
  46. Gravattack (Ogie Banks)
  47. Feedback (Kevin Michael Richardson)
  48. Sonic Rex (T-Rex roar, Jurassic Park)
  49. Gator-Croc (Kevin Michael Richardson)
  50. Grip Claw (Andre Breaguer)
  51. Leviathan (Mark Hamill)
  52. Firehorn (Charlie Adler)
  53. Phantom Bird (John DiMaggio)
  54. El Chupacabra (Jim Cummings)
  55. Loch Ness (Corey Burton)
  56. Ultimate Swampfire (Dee Bradley Baker, later Ogie Banks)
  57. Ultimate Echo Echo (Dee Bradley Baker, later Kath Soucie)
  58. Ultimate Humungousaur (Dee Bradley Baker, later Kevin Michael Richardson)
  59. Ultimate Big Chill (Dee Bradley Baker, later Mark Hamill)
  60. Ultimate Spidermokney (Dee Bradley Baker, later Frank Welker)
  61. Ultimate Cannonbolt (Dee Bradley Baker, later Fred Tatasciore)
  62. Ultimate Wildmutt (Dee Bradley Baker, later Frank Welker )
  63. Ultimate Way Big (Dee Bradley Baker, later Fred Tatasciore)


Season 1: 2010[]

Episode_Number Title_for_the_Episode Air_Date Summary Villains Aliens
1 Fame April 23, 2010 Ben's secret identity is exposed, casting him into the spotlight. Elsewhere, the first of the five alien prisoners captured by Agreggor (named Bivalvin) plans to detonate a nuclear bomb to repair his spaceship. Bivalvan, Aggegor Humungousaur, Jetray, Chromastone, Spidermonkey, Ultimate Spidermonkey
2 Duped April 30, 2010 Ben feels the pressure of fame and finds a way to be in three places at once. King Urien and Forever Knights Rath, Echo Echo x2, Humungousaur, Big Chill, Upchuck, Cannonbolt, Lodestar
3 Hit Em' Where They Live May 7, 2010 With Ben's identity revealed, Zombozo, Charmcaster and Vulkanus team up to destroy his parents. Zombozo, Charmcaster, Vulkanus, Rojo, Sevenseven Rath, Swampfire, Big Chill, Ultimate Big Chill
4 Computer Games May 14, 2010 Ben stars in a video game which is really a trap set by Will Harangue. Will Harangue, Ssserpent Fourarms, Humungousaur x2, Nanomech x2, Jetray x2, Spidermonkey, Swampfire, Cannonbolt, Big Chill, Lodestar, Way Big
5 Escape from Aggregor May 21, 2010 Galapeagus, the second of the five aliens captured by Agreggor, tells the story of the how he and four other aliens escaped Agreggor. Aggregor, Dr. Animo Fourarms, Brainstorm, Big Chill, Ultimate Big Chill
6 Too Hot to Handle May 28, 2010 P'andor, the third of the five aliens captured by Agreggor, dupes Kevin into releasing him from his containment unit, making him near unstoppable. P'andor, Buzz, Hammer, Surgeon Humungousaur, Ultimate Humungousaur, Jetray, Water Hazard, Big Chill, Cannonbolt, Ultimate Cannonbolt
7 Andreas' Fault June 4, 2010 Thanks to his newfound "friend" Andreas, Argit lands a leadership position with the Forever Knights, much to the gang's chagrin. Argit, Sir Dagonet, Forever Knights, Aggregor Spidermonkey, Jetray, Goop, Swampfire
8 Fused June 11, 2010 Ben is stuck in his newest alien form, Ampfibian, and is targeted by Aggregor, who plans to destroy him. Aggregor Jetray, Ampfibian, Brainstorm
9 Hero Time June 18, 2010 Ben must defeat his childhood idol, Captain Nemesis, who is secretly evil. Meanwhile there is tension between Ben and Julie after an actress kisses him. Captain Nemesis/Overlord, Will Harangue Spidermonkey, Jetray, Armodrillo, Humungousaur x2, Rath, Fourarms, Ultimate Humungousaur, Goop, Water Hazard
10 Ultimate Aggregor September 24, 2010 Aggregor's plot is unveiled. He fuses himself with Bivalvin, Galapeagus, Phandor, Andreas, and Rad to become Ultimate Agreggor. Could it be too late to thwart him? Aggregor Big Chill, Ultimate Big Chill, Lodestar, Swampfire, Ultimate Swampfire, Nanomech, Humungousaur
11 Map of Infinity October 1, 2010 The team track down the first piece of the Map of Infinity that Aggregor's after on a half-frozen, half-molten planet. If Agreggor gets all four pieces, he'll be able to go to the Forge of Creation, where he can get limitless power. Aggregor Humungousaur, Big Chill, Echo Echo, Ultimate Echo Echo, Fourarms, Cannonbolt
12 Reflected Glory October 8, 2010 Cash and J.T. take credit for Ben's heroics and Psyphon targets them, believing they defeated Vilgax. Psyphon, R.E.Ds, Forever Knights Armodrillo, Terraspin, Fourarms, Spidermonkey, Ultimate Spidermonkey
13 Deep October 15, 2010 The team goes to a water planet, where they think they'll find Aggregor looking for the second piece of the Map. Aggregor Goop x2, Humungousaur, Ampfibian, Big Chill, Ultimate Big Chill
14 Ghost on the Loose October 22, 2010 Ghostfreak is on the loose and Ben is held responsible! Ghostfreak
15 Where the Magic Happens October 29, 2010 Gwen has to persuade Charmcaster to help the team survive in a magical dimension where they think they'll find Aggregor looking for the third piece of the Map. Adwaita, Aggregor Fourarms, Jetray, Cannonbolt, Chromastone, Humungousaur, Ultimate Humungousaur
16 Perplexahedron November 5, 2010 The team goes to a cube-like planet where they think they'll find Aggregor and the last piece of the Map. Aggregor Humungousaur, Ripjaws, Spidermonkey, Swampfire, Cannonbolt, Ultimate Cannonbolt
17 The Forge of Creation November 12, 2010 Professor Parodox takes the team to a place called the Forge of Creation to thwart Aggregor, who has all four pieces of the map, one last time. They stop Aggregor but Kevin is mutated and yet again becomes Ultimate Kevin. Aggregor, Ultimate Kevin

Ben: Alien X, Terraspin, NRG, Fourarms, Swampfire, Ultimate Swampfire

10-Year Old Ben: Heatblast, Wildmutt, Fourarms, Stinkfly

18 ....Nor Iron Bars a Cage November 19, 2010 Kevin returns to a prison planet to get revenge on the manager who killed his friend and Ben and Gwen have to stop him. Morgg, Ultimate Kevin Goop, Humungousaur, Echo Echo, Armodrillo
19 The Enemy of My Enemy December 3, 2010 Argit helps the Vreedle Brothers pass by infiltrating the Plumbers Academy. Ultimate Kevin, Argit Jetray, Humungousaur, Ultimate Humungousaur, Echo Echo, Ultimate Echo Echo
20 Absolute Power: Part 1 December 10, 2010 Ben and Gwen seek Darkstar's help to battle Kevin. Ultimate Kevin, Forever Knights, Vulkanus NRG x2, Chromastone, Terraspin, Nanomech, Way Big, Lodestar, Humungousaur
21 Absolute Power: Par 2 December 10, 2010 As Kevin grows stronger, Ben and Gwen get Cooper's help to drain him of his power. Ultimate Kevin Big Chill, Spidermonkey, Echo Echo, Ultimate Echo Echo

Season 2: 2011[]

Episode_Number Title_for_the_Episode Air_Date Summary Villains Aliens
22 The Transmogrification of Eunice February 4, 2011 The gang come across an amnesiac alien who's being hunted by Sunder. Sunder Armodrillo, Spidermonkey, Ultimate Spidermonkey, NRG, Cannonbolt, Ultimate Cannonbolt
23 Eye of the Beholder February 11, 2011 Ben and friends set out to rescue the captured Bazel. Sanctuary Guards, Forever Knights Humungousaur, Jetray, Brainstorm, Swampfire, Ultimate Swampfire
24 Viktor: The Spoils February 18, 2011 An aged monarch uses the frozen remains of Dr. Viktor as his new body. King Viktor, King Xarion, Prince Gyula Echo Echo, Ultimate Echo Echo, Big Chill, Ultimate Big Chill, Chromastone, Wildmutt, Goop, Ampfibian, Heatblast
25 The Big Story March 4, 2011 Jimmy comes to the rescue when the gang face evil alien plants. Plant Alien, Sevenseven

Ben: Rath, Swampfire, Ultimate Swampfire

Plant Ben: Humungousaur, Cannonbolt, Chromastone

26 Girl Trouble March 11, 2011 Gwen's cousin visits, and she's hiding a secret. Sunny, Antonio, Computrons Fourarms, Lodestar, Humungousaur, Ultimate Humungousaur
27 Revenge of the Swarm March 18, 2011 Elena and the nanochips return with a twist. The Queen and Nanochips Humungousaur, Cannonbolt, Goop, Terraspin, Water Hazard, Armodrillo
28 The Creature from Beyond March 25, 2011 An evil creature has plans to enslave humans after his accidental release from another dimension. Lucubra, Old George, Sir Cyrus, Forever Knights Humungousaur, Swampfire, Chromastone, Goop, Armodrillo, NRG
29 Basic Training April 1, 2011 Ben and the gang train at the Plumber's Academy with Magister Hulka, later dealing with a menacing tetramand. Kolar, Trumbipulor Ultimate Echo Echo, Fourarms x2, Swampfire, Fasttrack, Diamondhead, Terraspin
30 It's Not Easy Being Gwen April 8, 2011 Gwen must juggle things around, in which she has to help Ben and Kevin re-capture Dr. Animo, fill out invitations for her mom's family reunion, help Kevin get into school, finish exams, and go to her best friend Emily's piano performance. Can she do it all? Dr. Animo Big Chill, Wildmutt, Jetray, Humungousaur, Spidermonkey, Cannonbolt x2, Ultimate Cannonbolt
31 Ben 10,000 Returns April 15, 2011 Joining Paradox on the hunt for Eon, an enemy of a self from an alternate timeline, Ben meets his actual future self. Eon

Ben: Spidermonkey, Fourarms, Goop, Way Big, Swampfire, Ultimate Swampfire, Jetray

Ultimate Ben: Ultimate Humungousaur x2, Arcticguana, Heatblast, Clockwork x2, Spidermonkey x2, Jetray, Diamondhead x2, XLR8 x2

32 Moonstruck April 22, 2011 The history of Max and Verdona Tennyson is revealed in flashbacks. Synthroid Fourarms
33 Prisoner #775 is Missing April 29, 2011 The secrets of Area 51 are revealed to Ben Tennyson by Colonel Rozum after Old George infiltrates and destroys it, setting free the 775th prisoner. Prisoner #775, Old George Swampfire, Big Chill, Rath, Echo Echo, Humungousaur, Wildmutt, Ultimate Wildmutt, ChamAlien
34 The Purge May 6, 2011 With the help of the Forever Knights, Old George starts a war against all aliens on Earth. He plans to have the aliens on Earth forcefully evicted while having Driscoll oversee it. Old George, Forever Knights, Trumbipulor NRG x2, Wildmutt, Lodestar, Upchuck, Spidermonkey, Ultimate Spidermonkey
35 Simian Says May 13, 2011 Simian accidentally unleashes a Xenocyte Queen which orchestrates an invasion the Arachnachimps' planet. When Eunice goes missing, Ben, Gwen, and Kevin end up helping Simian liberate the Arachnachimps' planet from a DNAlien version of the Arachnachimp Mizaru. Mizaru Terraspin, Swampfire, Spidermonkey, Ultimate Spidermonkey
36 Greetings from Techadon May 20, 2011 Techadon robots go after Ben on orders from Vulkanus. Vulkanus, Techadons Brainstorm, Goop, Rath, Big Chill, Ultimate Big Chill, Echo Echo, Ultimate Echo Echo
37 The Flame Keepers' Circle May 27, 2011 Julie joins a cult called the Flame Keepers' Circle. Ben discovers that the Flame Keepers' Circle worships Vilgax, whom they mistook for Dagon, a destructive squid-like monster. Vilgax, The Flame Keepers' Circle ChamAlien, Big Chill, Ultimate Big Chill, Echo Echo
38 Double or Nothing June 3, 2011 Albedo profits from Ben's fame and creates a play about him with the help of three alien actors based on the aliens in Ben's Ultimatrix. Albedo

Ben: Armodrillo, Water Hazard, NRG x2, Spidermonkey x2, Ultimate Spidermonkey x2, Echo Echo, Ultimate Echo Echo

Albedo: Grey Matter, Rath

39 The Perfect Girlfriend June 10, 2011 Elena and the nanochips return and impersonate Julie while the real Julie is at a tennis tournament overseas. Ben does not catch onto this until the very end when the real Julie returns and causes Elena to realize that she never truly loved Ben. The Queen and the Nanochips, Ssserpent Goop, Spidermonkey, Jetray, Way Big, Echo Echo, Ultimate Echo Echo
40 Ultimate Sacrifice June 17, 2011 The ultimate aliens inside Ben's Ultimatrix demand their freedom and end up sucking Ben into the Ultimatrix. While Gwen assumes her Anodite form to enter the Ultimatrix to help Ben, Kevin travels to Galvan Prime to convince Azmuth to help. The Ultimate Aliens Humungousaur, Ultimate Humungousaur, Ghostfreak, Heatblast, Brainstorm, Diamondhead, Way Big
41 The Widening Gyre September 16, 2011 The gang look into the Pacific Garbage Vortex when some people have gone missing. When they arrive, they find the missing people and two agents sent by Colonel Rozum while dealing with giant seagulls and a sentient Trash Monster. Garbage Monster Terraspin, NRG, Way Big
42 Mother of All Vreedles September 23, 2011 Ma Vreedle plans to spawn an army of Pretty Boy Vreedle clones, which could dry up Earth's oceans. Ma Vreedle, The Vreedle Brothers, Pretty Boy Vreedle Jetray, Spidermonkey, Ultimate Spidermonkey, Big Chill
43 Inspector #13 September 30, 2011 Techadon Weapon Master 13 arrives on Earth and demands the Ultimatrix. Inspector #13 and Techadons

Ben: Echo Echo, Terraspin, Fourarms

Gwen: Diamondhead, Clockwork, Humungousaur, Upchuck, Rath

Kevin: Jetray, Wildmutt, Way Big, Nanomech, Ampfibian

44 The Enemy of My Frenemy October 7, 2011 Gwen and the gang set out to rescue Charmcaster. Charmcaster, Adwaita, Diagon Fasttrack, Eatle x2, Chromastone
45 Creeping Slim October 14, 2011 The Limax have returned, and are taking hostage senior citizens again, and it's up to Ben, Gwen, Kevin (who is really tired of Ben getting respect and not him), Alan, Cooper (who is revealed to have dated Julie), Kai and Edwin (who is revealed to have dated Gwen) to save them. Limax
46 Couples Retreat October 21, 2011 Left alone powerless, Clancy gets the power of the Swarm from Elena, and Ben and the gang team up with Generator Rex to help free Elena from the Swarm and stop Clancy. Meanwhile, Ben, Kevin and Cooper make a bet that they go on separate dates: Ben shows Eunice the ways of humanity and might have feelings with each other, and Aggregor tends to kidnap her in order to make him more powerful, Kevin helps Gwen feel better after she screamed looking at the mirror, and Cooper takes Julie for a date by watching her in a tournament, to cover for Ben. The Queen, Clancy, Aggregor and Black Knight Upchuck, Fourarms, Fasttrack x2, Big Chill, Ripjaws, Wildvine, Rath, Spidermonkey, Ultimate Spidermonkey, Jetray, Sonic Rex, Swampfire, Humungousaur, Ultimate Humungousaur, Diamondhead, Nanomech
47 "Rock and Rule" November 4, 2011 An alien abducts Ben into singing a song called, with a rock band singing, "Wanted Dead or Alive (Bon Jovi), Hey Baby (Jonas Brothers), Vacation (Simple Plan)", and it's up to Gwen, Kevin and Max to save him.
48 False Hope November 11, 2011
49 Enter the Emperor November 18, 2011
50 A Knight to Remember November 25, 2011 Vilgax and the Flame Keepers' Circle fight against George and the Forever Knights along with Ben Tennyson. Vigax gets Diagon's heart and ends up being sucked into Diagon's dimension. Vilgax, Forever Knights, Flame Keepers' Circle, Diagon Rath, Fasttrack, Eatle
51 Solitary Alignment November 25, 2011 Azmuth reveals how Old George got his sword and slayed Diagon. Sir George, Forever Knights, Diagon Fasttrack, Humungousaur x2, Ultimate Humungousaur
52 Catch a Falling Star February 3, 2012 Jennifer Nocturne runs away with Captian Nemesis after freeing him from jail in hopes of creating a new life with him. Captain Nemesis and Jennifer Nocturne Humungousaur, Goop, Clockwork, Swampfire, Eatle
53 Divide and Conquer February 10, 2012
54 Dance of the Wolf February 17, 2012 Ben and Kevin are out visiting the Navada town to protect it from a pack of Yenaldooshis. Yenaldooshis
55 The Eggman Cometh February 24, 2012 Dr. Animo returns with a plot to transform eggs into pterodactyls. Dr. Animo Fasttrack x2, Jury Rigg x3, Clockwork, Swampfire, Humungousaur, Big Chill, Jetray
56 Night of the Living Nightmare March 2, 2012 Ben must rescue Gwen (who is fearing that she was chaning from her original series self to her Alien Force self and to her Ultimate Alien self) and Kevin (who was fearing that it was his fault he touched the Ultimatrix to turn himself into his Ultimate Alien mutant form, which he blames Kevin for) from Enoch's dream world. Enoch, Hex (cameo), Trumbipolar Jetray, Heatblast, Echo Echo, Spidermonkey, Ultimate Spidermonkey, Jury Rigg, Fourarms
57 Day and Knight March 9, 2012
58 The Beginning of the End March 16, 2012 Ben, Gwen, Kevin, and George trash Diagon's City while battling a reborn, Lucubra-morphed, power hungry Vilgax. Diagon is released and plans to become ruler of Ben's Universe. Diagon, Vilgax, Psyphon, The Estorica, Forever Knights Fourarms, Clockwork, Goop, Fasttrack, Heatblast, Eatle, Humungousaur, Jury Rigg, Way Big, Ultimate Way Big, Wildmutt, Ultimate Wildmutt, Chromastone
59 The Ultimate Enemy: Part 1 March 23, 2012 Vilgax now has energy of Diagon, and is now stronger and leads the Estorica as they head out to Primus to kidnap Eunice, so Vilgax could absorb her power by getting Vilgax more stronger with his energy of how dangerous Eunice could be when Vilgax has fully control of her powers combined with Diagon's. Vilgax, Conduit Edwards, Psyphon, the Estorica and Sevenseven
60 The Ultimate Enemy: Part 2 March 23, 2012 Ben must defeat Vilgax before he gains control of the universe, and Ben and Kevin turn to the Plumbers' Helpers, Charmcaster, Elena, Rex and Providence to stop Vilgax. Vilgax, the Estorica and Sevenseven