Ben Tennyson (voice) (52 episodes)
Gwen Tennyson (voice) (52 episodes)
Kevin Levin (voice) (52 episodes)
Humungosaur (voice) (52 episodes)
Aggregor (voice) (5 episodes)
Vulkanus / Rath (voice) (4 episodes)
Will Harangue / Octagon Vreedle (voice) (3 episodes)
Diagon (voice) (3 episodes)
Rath / Conduit Edwards / Diagon (voice) (2 episodes)
Plumber / Aggregor (voice) (1 episode)
Spellbinder / Addwaitya / Diagon (voice) (1 episode)
Young Four Arms / Aggregor (voice) (1 episode)
Will Harangue / Rath (voice) (1 episode)
Forever Knight #2 / Rath / TV Reporter (voice) (1 episode)
Ultimate Aggregor / Volann Commander (voice) (1 episode)
Conduit Edwards / Carnival Barker (voice) (1 episode)
Magister Coronach / Octagon Vreedle (voice) (1 episode)
Audience Member / Will Harangue / Rath (voice) (1 episode)
Swamps / Rath Albedo / V.O. Announcer (voice) (1 episode)
Trash Monster / Colonel Rozum / Additional Voices (voice) (1 episode)
Foreverduke838 (voice) (1 episode)
Addwaitya / Aggregor / Faint Voice (voice) (1 episode)
Azmuth (voice) (8 episodes)
Magister Labrid / Major General (voice) (1 episode)
Major Domo / Hugh (voice) (1 episode)
Pops Vreedle / Jailer (voice) (1 episode)
Julie Yamamoto / Computer Voice (voice) (5 episodes)
Julie Yamamoto / Ship (voice) (2 episodes)
Julie Yamamoto (voice) (2 episodes)
Mrs. Jones (voice) (1 episode)
Erin / Julie Yamamoto (voice) (1 episode)
Max Tennyson / Guard #1 / Guard #2 (voice) (7 episodes)
Sir George (voice) (5 episodes)
Old George (voice) (1 episode)
Natalie Tennyson / Melinda (voice) (3 episodes)
Fritz (voice) (1 episode)
Verdona Tennyson / Waitress (voice) (1 episode)
Vilgax (voice) (5 episodes)
Argit (voice) (4 episodes)
Charmcaster (voice) (4 episodes)
Foreman / Surgeon / Hammer (voice) (1 episode)
Quince / Robot Guard (voice) (1 episode)
Staradisimus / Forever Knight #3 (voice) (1 episode)
Rhomboid Vreedle / Magister Patelliday (voice) (1 episode)
Baz-El / Forever Knight #1 / Churl #4 (voice) (1 episode)
Technician / Rhomboid Vreedle / Engineer #2 (voice) (1 episode)
Professor Paradox (voice) (3 episodes)
Dr. Animo / Teacher #2 (voice) (2 episodes)
Sheriff / Dr. Animo (voice) (1 episode)
Mike Morningstar / Darkstar (voice) (3 episodes)
Winston / Esoterica / Additional Voices (voice) (3 episodes)
Cooper (voice) (2 episodes)
Prince Gyula / Cyborg #2 (voice) (1 episode)
Dagonet / Reporter Chet Rigby (voice) (1 episode)
Oliver / Forever Knight #1 (voice) (2 episodes)
Kwarrel (voice) (1 episode)
Magister Pyke (voice) (1 episode)
Young Max Tennyson (voice) (1 episode)
Antonio (voice) (1 episode)
Announcer / Fake Vilgax / Fridge (voice) (1 episode)
Plumber Officer / Brannigan / Kolar (voice) (1 episode)
Eunice / Computer (voice) (2 episodes)
Elena Validus (voice) (2 episodes)
Sir Cyrus / Additional Voices (voice) (2 episodes)
Driscoll / Additional Voices (voice) (2 episodes)
Captain Nemesis (voice) (2 episodes)
Jennifer Nocturne (voice) (2 episodes)
Alan Albright / Heatblast (voice) (2 episodes)
Ben 10,000 / Eon (voice) (1 episode)
Cameraman / Thug / Tech (voice) (1 episode)
Sunder (voice) (1 episode)
King Xarion / King Viktor (voice) (1 episode)
Sandra Tennyson (voice) (1 episode)
Magister Gilhil / Plumber (voice) (1 episode)
Simons / Worker / Guest (voice) (1 episode)
Cash (voice) (1 episode)
Serena / Young Ben Tennyson (voice) (1 episode)
Warden Morgg / Trukk (voice) (1 episode)
Victor Valadis / Janitor (voice) (1 episode)
Magister Hulka / Alpha #4 (voice) (1 episode)
Tack / Plumber (voice) (1 episode)
Emily (voice) (1 episode)
Pierce / Forever Knight #3 (voice) (1 episode)
Simian (voice) (1 episode)
Mizaru (voice) (1 episode)
Julie's Dad / Repair Man / Cop (voice) (1 episode)
Dr. Borges (voice) (1 episode)
Agent Bryson (voice) (1 episode)
Agent Locke (voice) (1 episode)
Ma Vreedle / Pretty Boy Vreedle (voice) (1 episode)
Hex (voice) (1 episode)
Maureen (voice) (1 episode)
Captain / Police Dispatch / Dr. Pervis (voice) (1 episode)
King Urien / Color Commentator / Chair Umpire (voice) (1 episode)
Zennith (voice) (1 episode)
Director (19 episodes)
Writer (1 episode)
Director (14 episodes)
Writer (39 episodes)
Writer (32 episodes)
Writer (9 episodes)
Writer (7 episodes)
Writer (5 episodes)
Writer (3 episodes)
Writer (2 episodes)
Writer (2 episodes)
Writer (2 episodes)
Writer (2 episodes)
Writer (1 episode)
Writer (1 episode)
Writer (1 episode)
Writer (1 episode)
Writer (1 episode)
Writer (1 episode)
Writer (1 episode)
Writer (1 episode)
Writer (1 episode)
Writer (1 episode)