Eric Bauza – Diamondhead, Eatle, Grey Matter, Upchuck, Chromastone, Driba, Dr. Psychobos, Fistrick, Megawhatt, Articguana, Way Big, Albedo (Galvan form), Bellicus (of Alien X), Pax, Solid Plugg, Ripjaws, Lackno, Mechaneer, Trombipulor, Computrons, Rook Da, Thunderpig, Commander Raff, Cast Iron, Poltroon, Ultimate Albedo, Buzzshock, Ultimate Articguana, Plumber Jerry, Cooper Daniels Corey Burton – Malware, Mr. Baumann, Brainstorm, Seebik, Fiskerton, V.V. Argost, Albedo Brainstorm, Kane North/Kangaroo Kommando John DiMaggio – Armodrillo, Zombozo, Bubble Helmet, Four Arms, Rath, Humungousaur, Octagon Vreedle, Vulkanus, Bullfrag, Will Harangue, Ultimate Humungousaur, Tentacle Vendor, Atomix, Whampire, Judge Domstol, Centur Squarr David Kaye – Khyber, Cannonbolt, Shocksquatch, Gravattack, Heatblast, Sunder, Frankenstrike, Mallice, Warlord Gar, Ultimate Gravattack, Thumbskull, Forever King Joseph Chadwick (2nd Time), Lord Transyl, Deefus Veeblepister, Unitaur, Slapstrike, Exo-Skull, Skurd Rob Paulsen – Magister Patelliday, Rhomboid Vreedle, Ditto, Captain Kork, Tummy Head, Gorvan, Phil, Gutrot Kevin Michael Richardson – Snare-oh, Blitzwolfer, Emperor Milleous, Cookmeister, Sir Morton, Plumber Dispatcher Tara Strong – Ben Tennyson (5, 10, and 11-years-old), Pakmar, Mazuma, Natalie Alvarez, Ben Tennyson of Dimension 23, Y-It, Molly Gunther, Brown Bag, Princess Attea, Lucy Mann, Pesky Dust (2nd Time), Albedo (11-year-old Ben form), ML-E (1st Time), ML-E's Mother, Duffy, Swift, Diamondhead Gwen Additional voices Charlie Adler – Professor Blarney T. Hokestar, Cow Alien, Chicken Alien, Collectimus, Proctor Servantis Carlos Alazraqui – Rad Dudesman, Scout, Pyxi Aziz Ansari – Billy Billions René Auberjonois – Azmuth, Azmuth of Dimension 23, Intellectuary Diedrich Bader – Simian Ogie Banks – Zak Saturday Jeff Bennett – Kundo Steven Jay Blum – Vilgax, Hobble, Zs'Skayr, Ghostfreak, Professor Helena Xagliv, Bill Gacks, Adwaita, Pa Vreedle, Thaddeus J. Collins Kimberly Brooks – Princess Looma, Serena (of Alien X), Madison, Rayona, Rook Bralla Bettina Bush – Kai Green Greg Cipes – Kevin Levin (12, 17 and 43 years old) Jeffrey Combs – Kuphulu Jim Cummings – Vexx, Hulex Colonel Tim Curry – Forever King Joseph Chadwick (1st Time) Diane Delano – Ma Vreedle Michael Dorn – Dr. Viktor Dave Fennoy – Tetrax Shard of Dimension 23 Michael Goldstrom – Benevelon Jennifer Hale – Rojo, Suemongousaur Mark Hamill – Maltruant Jon Heder – Clyde Fife Ashley Johnson – Gwen Tennyson (11, 16 and 42 years old), Margie, Wildvine Gwen, Cannonbolt Gwen, XLR8 Gwen Tom Kenny – Bezel Phil LaMarr – Jonesy Juliet Landau – Helen Wheels, Magistrata Beth Littleford – Sandra Tennyson, Isosceles Right Triangle Vreedle Morgan Lofting – Fistina, Yetta Vanessa Marshall – Drew Saturday David McCallum