Psycho Yellow

Psycho Yellow was based on Ashley Hammond's brain wave patterns and automatically knew everything about Ashley, her weapons and strategies. She preferred operating alone to fulfill her own goals.

In Space
She was first seen in her true, monster form on Onyx during Andros' visit there in disguise, among many other monsters. Andros did not interact with her at that time.

She, along with the other Psycho Rangers, attacked Angel Grove disguised as the Yellow Space Ranger, causing a great deal of destruction before the real rangers arrived. During the battle which ensued, they revealed themselves as the Psycho Rangers and nearly defeated the Power Rangers, before Astronema recalled them.

After the second battle which almost resulted in the death of the Space Rangers, Astronema pulled the Psychos out because everytime they fought, some of Dark Specter's power would ebb away. Astronema developed a hate for him when she was kidnapped and was brainwashed with cybernetic implants after sneaking onto Dark Specter's ship to stop a meteor.

During one of the battles, the Psychos had captured the Mega Voyager and hidden it on a planet. They used it as bait to lure the Space Rangers into a trap. When the Rangers arrived to recover their zords, they discovered that Psycho Yellow had turned herself into a computer virus and inserted herself into the Zord's computers, controlling it completely. She was defeated when the Psychos began fighting amongst themselves and attacked the Mega Voyager, forcing her to evacuate. The Psycho Rangers were destroyed by the Power Rangers.

The Psychos returned in ghost form, and were unable to attack the Rangers. However, they were able to use Astronema's digitizing machine to reconstitute themselves and then they attacked again. The rangers were able to lure them back to the digitizing machine. This resulted in Yellow and the others being digitized, with Astronema last seen in possession of the data cards that contained them.

Lost Galaxy
Deviot retrieved the data cards with the Psychos on them a year later and resurrected them to serve him. He sent Psycho Yellow after the Lost Galaxy Rangers. Due to her innate hatred of the Yellow Ranger who destroyed her, Yellow snatched the first Yellow Ranger she saw: Maya. Later, with help from Ashley and the other Space Rangers, Maya and the Lost Galaxy Rangers forever destroyed the Psychos. Psycho Yellow used the Psycho Sling and had a reptilian hornet like monster form.

Arsenal

 * Psycho sling