Tara Strong
Ben Tennyson / Glitch (voice)

Montse Hernandez
Gwen Tennyson (voice)

David Kaye
Grandpa Ken / Max Tennyson / Azmuth Humungousaur / Omni-Kix Humungousaur / Omni-Naut Humungousaur / Shock Rock / Omni-Naut Shock Rock (voice)

Dee Bradley Baker
Jetray / Omni-Kix Jetray / Omni-Naut Jetray / Rath / Goop (voice)

Roger Craig Smith
Diamondhead / Steam Smythe (voice)

Daryl Sabara
Heatblast / Omni-Naut Heatblast (voice)

John DiMaggio
Phil Billings / Four Arms (voice)

Yuri Lowenthal
Vilgax / Alien V (voice)

Greg Cipes
Kevin Levin / Quad Smack / Bashmouth / Crystalfist / Rush / Hot Shot / Dark Matter / Bootleg (voice)

Todd Haberkorn
Slapback / Tetrax Shard / Solar Twain (voice)

Travis Willingham
Cannonbolt (voice)

Tom Kenny
Polar Twain (voice)

Josh Keaton
XLR8 (voice)