Ben 10: Ultimate Alien Season 2

Vilgax has returned and challenges Aggregor for the Potis Altiare. And Elena Validus returns with Ben, Gwen and Kevin. Kai Green returns and falls in love with Alan Albright (who might have a same growth sprout like Cooper Daniels), Albedo's Evil Way Big appears in animation, Zs'Skayr returns, and Frightwig makes a reappearance with Buzz, Hammer and Surgeon (the three who were trying to help break P'andor free from his suit) as her new gang of the Nuevo Circus Freaks. And Enoch returns with the Forever Knights, and the Andromeda Aliens Aggregor captured are now Plumbers.

Premired
April 15, 2011

Main Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin
 * Elena Validus

Recurring Characters

 * Alan Albright
 * Andreas
 * Azmuth
 * Bivalvan
 * Charmcaster (now a good guy)
 * Cooper Daniels
 * Galapagus
 * Grandpa Max (R.I.P. in a future episode)
 * Helen Wheels
 * Jimmy Jones
 * Julie Yamamoto (might become evil in a future episode)
 * Kai Green
 * Manny Armstrong
 * P'andor
 * Pierce
 * Professor Paradox
 * Ra'ad
 * Ship
 * Tetrax Shard

Villains

 * Aggregor
 * Albedo
 * Buzz
 * Dr. Vicktor
 * Enoch
 * Forever Knights
 * Frightwig
 * Hammer
 * Kraab
 * Psyphon
 * R.E.D.
 * Sevenseven
 * Surgeon
 * Techadon
 * Thep Khuftan
 * Vilgax (returned)
 * Vulkanus
 * Will Harangue
 * Yenaldooshi (survived)
 * Zs'Skayr

Aliens

 * Alien X
 * AmpFibian
 * Armodrillo
 * Benmummy
 * Benvicktor
 * Benwolf
 * Big Chill
 * Brainstorm
 * Cannonbolt
 * Chromastone
 * Diamondhead
 * Ditto
 * Echo Echo
 * Eye Guy
 * Fourarms
 * Ghostfreak
 * Goop
 * Grey Matter
 * Heatblast
 * Humongousaur
 * Jetray
 * Lodestar
 * Nanomech
 * NRG
 * Rath
 * Ripjaws
 * Spidermonkey
 * Stinkfly
 * Swampfire
 * Terraspin
 * Upchuck
 * Upgrade
 * Water Hazard
 * Way Big
 * Wildmutt
 * Wildvine
 * XLR8

Ultimate Forms

 * Ultimate Big Chill
 * Ultimate Cannonbolt
 * Ultimate Echo Echo
 * Ultimate Humongousaur
 * Ultimate Jetray
 * Ultimate Spidermonkey
 * Ultimate Swampfire

Episodes

 * 1) Vilgax Descending: Part One
 * 2) Vilgax Descending: Part Two
 * 3) A 10 to Remember
 * 4) Back from the Past
 * 5) The Super Soldiers Attack
 * 6) New Circus Freaks in Town
 * 7) Taednite
 * 8) Multiplication
 * 9) Ben's Pal
 * 10) Roll Up
 * 11) Yummy, Yummy, Yummy
 * 12) Attack on Galvan Prime
 * 13) Eye for an Eye
 * 14) The Ultimate Creature: Part One
 * 15) The Ultimate Creature: Part Two
 * 16) Return of Aggregor: Part One
 * 17) Rerun of Ultimate Aggregor: Part Two
 * 18) Rise and Not Fall of Albedo
 * 19) Ghost on the Loose
 * 20) Attack on Nevado
 * 21) Family Reunions
 * 22) Another Body Swap Spell
 * 23) The Haunted: Part One
 * 24) The Haunted: Part Two
 * 25) The Haunted: Part Three
 * 26) My Girlfriend Hypnotized
 * 27) Rise of the Gryonites
 * 28) My Heart Belongs to You
 * 29) What Lies Beneath
 * 30) Legacy of Evil: Part One
 * 31) Legacy of Evil: Part Two
 * 1) Legacy of Evil: Part Two