Primator

Primator is a white baboon/ape shape-shifter monster. Created by Lord Zedd from Zack's white gorilla suit, Primator had the ability to shape shift into any of the Power Rangers, in both their Ranger forms and as normal teenagers, although seeing his reflection would dispel the illusion and force him to revert to his normal form. He attacked Alpha 5 in a failed attempt to infiltrate the Command Center, then battled the Power Rangers, completely overwhelming them with his strength & shape shifting powers. Besides his ability to transform, Primator could also fire white lightning bolts from his hands, as well as some type of unseen blast from his head. When disguised as the Red Ranger, Primator could fire explosive laser beams from the tyrannosaurus eyes of the helmet. Lastly, Primator could teleport & was armed with a lance (that appeared to be brittle, as it was broken twice). With Zordon's help, the Rangers figured out that having Primator see himself in reflective surfaces would revert him to his true form. Grown to giant size by Lord Zedd, Primator fought the Thunder Megazord & Dragonzord, mostly focusing on the Dragonzord, but was destroyed by what appeared to be a surprise attack using the Thunder Saber, because the monster, tougher than it appeared to be initially (demonstrated when overpowering the Rangers after they cornered him and later the Dragonzord), may not have given them the time to power up the Thunder Saber otherwise.