"Fake Ridley" is an unused enemy in the original Metroid for the NES/Famicom Disk System.

Similar to Mini-Kraid, it uses Ridley's attacks and dies in a single hit from a Missile or Screw Attack. It has a purple, orange, and magenta palette as opposed to the real Ridley's mauve, green and dark purple palette.

Fake Ridley can be found in the game's code and is fully functional as an enemy.