Ben Tennyson (voice) (52 Episodes)

Gwen Tennyson (voice) (52 Episodes)

Kevin Levin (voice) (52 Episodes)

Humungosaur (voice) (52 Episodes)

Aggregor (voice) (5 Episodes)

Julie Yamamoto / Computer Voice (voice) (5 Episodes)

Max Tennyson / Guard #1 / Guard #2 (voice) (7 Episodes)

Sir George (voice) (5 Episodes)

Jimmy Jones (voice) (3 Episodes)

Natalie Tennyson / Melinda (voice) (3 Episodes)

Vilgax (voice) (5 Episodes)

Argit (voice) (4 Episodes)

Charmcaster (voice) (4 Episodes)

Quince / Robot Guard (voice) (1 Episodes)

Baz-El / Forever Knight #1 / Churl #4 (voice) (1 Episodes)

Professor Paradox (voice) (3 Episodes)

Dr. Animo / Teacher #2 (voice) (2 Episodes)

Pops Vreedle / Jailer (voice) (1 Episodes)

Mike Morningstar / Darkstar (voice) (3 Episodes)

Winston / Esoterica / Additional Voices (voice) (3 Episodes)

Cooper (voice) (2 Episodes)

Dagonet / Reporter Chet Rigby (voice) (1 Episodes)

Oliver / Forever Knight #1 (voice) (2 Episodes)

Kwarrel (voice) (1 Episodes)

Antonio (voice) (1 Episodes)

Announcer / Fake Vilgax / Fridge (voice) (1 Episodes)

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 Episodes)

Sunder (voice) (1 Episodes)

King Xarion / King Viktor (voice) (1 Episodes)

Sandra Tennyson (voice) (1 Episodes)

Magister Gilhil / Plumber (voice) (1 Episodes)

Simons / Worker / Guest (voice) (1 Episodes)

Cash (voice) (1 Episodes)

Serena / Young Ben Tennyson (voice) (1 Episodes)

Warden Morgg / Trukk (voice) (1 Episodes)

Victor Valadis / Janitor (voice) (1 Episodes)

Magister Hulka / Alpha #4 (voice) (1 Episodes)

Tack / Plumber (voice) (1 Episodes)

Emily (voice) (1 Episodes)

Pierce / Forever Knight #3 (voice) (1 Episodes)

Simian (voice) (1 Episodes)

Mizaru (voice) (1 Episodes)

Julie's Dad / Repair Man / Cop (voice) (1 Episodes)

Dr. Borges (voice) (1 Episodes)

Agent Bryson (voice) (1 Episodes)

Agent Locke (voice) (1 Episodes)

Ma Vreedle / Pretty Boy Vreedle (voice) (1 Episodes)

Hex (voice) (1 Episodes)

Maureen (voice) (1 Episodes)

Captain / Police Dispatch / Dr. Pervis (voice) (1 Episodes)

King Urien / Color Commentator / Chair Umpire (voice) (1 Episodes)

Zennith (voice) (1 Episodes)