Ringbah

Ringbah is an alien bounty hunter and the main antagonist of this episode called "Walls".

He is voiced by Bruce Hopkins who previously voiced Choobo from Ninja Storm, Ruby Dragon from Dino Thunder and Praxis from this series and later voiced Clawbster from Mystic Force and Gakko from Jungle Fury.

History
He is is recruited by Emperor Gruumm to combat the B-Squad Rangers. However during the fight his Megazord was running low, so Mora contact him to retreat back to base.

A while later he was on the Terror Spacecraft being tortured by Gruumm however Mora stopped Gruumm to torture Ringbah to which she gave him an idea on how to power Ringbah's Robot is by powering it with diamonds.

A while later one of the Krybot brought a big diamond that'll power Ringbah's Robot and he was sent to Newtech City to keep the cadets occupied while the Krybots gather the remaining diamonds to bring back to Emperor Gruum.

The Delta Squad Megazord destroys his giant robot. He is defeated/contained by the Blue Ranger and his Deltamax Striker.