Lord Zedd
Driven away by the Machine Empire, Zedd returned to claim his position as Earth's would-be conqueror once he realized Mondo and his crew weren't all that. Zedd blew up the Machine Empire by giving them a bomb in the form of a present. Zedd was turned good, and human, by Zordon's energy wave in Power Rangers in Space.

Rita Repulsa
She has been trying to destroy the Rangers and take over the Earth since the first day she got out of the dumpster. Even after combining forces with Zedd by marrying him, the couple still proved to be no match for the Power Rangers. Rita was turned good, and human, by Zordon's energy wave in Power Rangers in Space.

Rito and Goldar
Zedd's two bumbling henchmen, a position once occupied by Squatt and Baboo. Rito is Rita's brother who came for a visit and never left. Goldar was once one of the most fearsome warriors around, but lately he hasn't been able to do anything right. The two were temporarily servants of Bulk and Skull when their memories were erased. Once it came back to them, they stole Bulk and Skull's motorcycle and went back to Rita and Zedd. Both were destroyed by Zordon's energy wave in Power Rangers in Space.

Finster
Finster helps out Zedd and Rita with his knowledge of science and magic, creating monsters and new weapons for them to use against the Rangers. He was last seen participating in the assault on the universe by the Alliance of Evil. He was presumably destroyed by Zordon's wave.

Tenga Warriors
Rito brought with him on his arrival to the Moon some eggs for Rita, which hatched into their new fighting force - the Tenga Warriors.