Tara Strong as Ben Tennyson / Glitch (voice)

Montse Hernandez as Gwen Tennyson (voice)

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

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

Roger Craig Smith as Diamondhead / Steam Smythe (voice)

Daryl Sabara as Heatblast / Omni-Naut Heatblast (voice)

John DiMaggio as Phil Billings / Four Arms (voice)

Yuri Lowenthal as Vilgax / Alien V (voice)

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

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

Travis Willingham as Cannonbolt (voice)

Tom Kenny as Polar Twain (voice)

Josh Keaton as XLR8 (voice)