Rangers' powers connected with evil, that's death combination... Here are pictures of Evil Power Rangers from all seasons.

Chojin Sentai Jetman:

Shadow Jetman (Jetman Kageningen) from episode 25 "Warau Kageningen". Based on this picture.

Mighty Morphin Power Rangers:
Evil Mighty Morphin Power Rangers: Are same as good rangers. Appeared in episode "A bad reflection on you"
Evil Blue Power Ranger: Clone of Billy. Appeared in episode "Blue Ranger Gone Bad"
Evil Green Power Ranger: Clone of Tommy. Appeared in episodes "Return Of The Green Ranger parts I - III"

Mutant Rangers: Appeared in episode "Mighty morphin' mutants" They morphed from Rita's Putties (based on this picture). Based on this picture.

Primator Ranger: This is shape-changing monster called Primator after he looked to mirror in episode "The wanna-be ranger" He
                           had appearence of all Mighty Morphin Power Rangers. (made by Cute Angel Ranger) Based on this picture.

 

Dark Rangers: Appeared in episode "Green no more part II" Based on this picture.

Ninja Sentai Kakuranger:

Ninja Sentai Hanaranger. Based on this picture.

Power Rangers Turbo:

 

Shadow Rangers: Appeared in episode "Shadow rangers" Based on this picture.

Power Rangers In Space:

Psycho Power Rangers: Appeared in episode "Rangers gone psycho" Based on this picture.

Psycho Power Rangers: Appeared in episodes "Rangers gone psycho" - "The enemy within", "Ghosts in the machine" (made by Cute Angel Ranger) Based on this picture.

Power Rangers Lost Galaxy:
Psycho Power Rangers: They had control devices on their arms so Deviot could control them. Appeared in episode "To the tenth power" Pink Psycho Ranger appeared also in episode "The power of pink" without that control device.

Power Rangers Lightspeed Rescue:

Cyborg Rangers: Appeared in episode "Cyborg rangers" (made by Cute Angel Ranger) Based on this picture.

Power Rangers Time Force:
Evil Power Rangers Time Force: Are same as good rangers. Appeared in episode "Trust and Triumph"

Hyakuju Sentai Gaoranger:
Shadow ninjas: Are same as Shadow Rangers in Power Rangers Wild Force.

Evil Gaoranger. Evil copies of the Gaoranger made by Copy Orugu in episode 12. Based on this picture.

Power Rangers Wild Force:

Shadow Rangers. Appeared in episode "The master's herald part II" Based on this picture.

Power Rangers Ninja Storm:
Evil Power Rangers Ninja Storm: Are same as good rangers. Appeared in episode "The wild wipeout"

Power Rangers Dino Thunder:
Evil White Dino Ranger: evil copy of White Dino Ranger. Appeared from episode "Copy that"

Power Rangers S.P.D.:

A-squad: Allied with Grumm. Appeared in episodes "Ressurection, Endings part I" (made by J. J. Wubs) Based on this picture.

Red S.P.D. Ranger: Charlie lost her helmet in fight against Jack. Appeared in episode "Endings part I" (made by J. J. Wubs)
                               Based on this picture.

Power Rangers Mystic Force:

Evil Power Rangers mystic Force. Appeared in episode "Light source" Based on this picture.