The villains of the Power Rangers universe that appeared in the television series Mighty Morphin Power Rangers and the film Mighty Morphin Power Rangers: The Movie were aliens serving or allied to Rita Repulsa and/or, later, Lord Zedd, including the warrior Goldar. Information about the other villains can be found below.
For the purposes of this article, the mini-series Mighty Morphin Alien Rangers is considered to be a part of the third season of Mighty Morphin Power Rangers. Villains from the movie, Mighty Morphin Power Rangers: The Movie, while they are covered in this page, are not considered part of Power Rangers television continuity.
Rita Repulsa was the primary antagonist for the first season, and later returned during the second to marry Lord Zedd. She is a witch who is the daughter of the first evil monarch of the M51 Galaxy, Master Vile. She has a brother named Rito and, via Zedd, a son named Thrax.
It is revealed in Power Rangers Turbo that Divatox is an acquaintance of Rita. When she asks Rita for advice on how to defeat the Power Rangers on the phone, Rita retorts that if she had known how to do that she would not be in her current predicament, and she holds the phone up to Lord Zedd's face, who is heavily snoring in his sleep. In Power Rangers in Space, however, their relationship is much more hostile as they fight for Dark Specter's attention, only to both get snubbed in favor of his disciple Astronema.
Rita Repulsa was played by Machiko Soga in Zyuranger footage, played by Carla Perez in U.S. footage, and played by Sydney native Julia Cortez in MMPR: The Movie. All her Power Rangers appearances are voiced by Barbara Goodson, who overdubs the actresses' lip movements with the unmistakable screechy voice that is among Rita's trademark characteristics.