The fictional villains of the Power Rangers universe that appeared in the television series Power Rangers S.P.D. were the Troobian Empire, a galactic empire and warlike army in the service of . The term Troobian refers to any being that serves under Gruumm (as stated by Bruce Kalish).
Gruumm's forces travel in the Terror Spacecraft that they use to travel throughout outer space in its journey to conquer and destroy planets. Inside, everything is green, dank, and skeletal.
Information about them can be found below.
Omni (voiced by Geoff Dolan) is secretly the power behind the throne and de facto leader of the Troobians. It is a giant brain housed in a tank in a room on Gruumm's spacecraft. It has a single eye on a tentacle-like appendage. It was mentioned on a few occasions throughout in the season, but was finally revealed at the end of the episode Insomnia, making Mora pledge her allegiance to it. In Endings, Part 1, it not only "spoke" for the first time (yelling at Gruumm over his petty feud with Cruger), but its name was revealed.
Read more about Emperor Gruumm at Wikipedia ...
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