Ben Tennyson / Glitch (voice)

Gwen Tennyson (voice)

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

Jetray / Omni-Kix Jetray / Omni-Naut Jetray / Rath / Goop (voice)

Diamondhead / Steam Smythe (voice)

Heatblast / Omni-Naut Heatblast (voice)

Phil Billings / Four Arms (voice)

Vilgax / Alien V (voice)

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

Slapback / Tetrax Shard / Solar Twain (voice)

Cannonbolt (voice)

Polar Twain (voice)

XLR8 (voice)