This location exists primarily within the Sonic the Comic continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Not to be confused with Gremlyn the robot.

Planet Gremlyn, from Sonic the Comic #152. Art by Roberto Corona.

Planet Gremlyn is a location that appears in the Sonic the Comic series published by Fleetway Editions. It is home to the Ultragem.


With the Ultragem hidden safely away in Castle Grimm, Amy Rose and Tekno reached it through the Eternity Ring. It is located in a distant galaxy.[1][2]


  1. Sonic the Comic #152, "Treasure Seeker Part One"
  2. Sonic the Comic #153, "Treasure Seeker Part Two"
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