Ben 10: Ultimate Alien

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) / Magister Coronach / Octagon Vreedle (voice) (1 episode) / Will Harangue / Rath (voice) (1 episode) / Young Four Arms / Aggregor (voice) (1 episode) / Addwaitya / Aggregor / Faint Voice (voice) (1 episode) / Audience Member / Will Harangue / Rath (voice) (1 episode) / Trash Monster / Colonel Rozum / Additional Voices (voice) (1 episode) / Foreverduke838 (voice) (1 episode) / Swamps / Rath Albedo / V.O. Announcer (voice) (1 episode) / Ultimate Aggregor / Volann Commander (voice) (1 episode) / Conduit Edwards / Carnival Barker (voice) (1 episode) / Forever Knight #2 / Rath / TV Reporter (voice) (1 episode)

Julie Yamamoto / Computer Voice (voice) (5 episodes) / Julie Yamamoto / Ship (voice) (2 episodes) / Julie Yamamoto (voice) (2 episodes) / Erin / Julie Yamamoto (voice) (1 episode) / Mrs. Jones (voice) (1 episode)

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

Sir George (voice) (5 episodes) / Old George (voice) (1 episode)

Jimmy Jones (voice) (3 episodes) / Jimmy / J.T. / Pilot 2 (voice) (1 episode) / J.T. (voice) (1 episode)

Natalie Tennyson / Melinda (voice) (3 episodes) / Verdona Tennyson / Waitress (voice) (1 episode) / Fritz (voice) (1 episode)

Vilgax (voice) (5 episodes)