This object exists primarily or exclusively 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.

Sonic trapped in the Retro Block from Sonic the Comic #30. Art by Mike Hadley and John M. Burns.

A Retro Block is an object that appears in the Sonic the Comic series published by Fleetway Editions. It is a special kind of prison cell used by minions of Doctor Robotnik.


It resembles a cube-shaped room made of grey brick, with a barred window on one wall, suspended in midair in the middle of a column of light and coloured orbs. If a prisoner tries to escape, then any force they use is reflected back on them.

Metamorphia attempted to imprison Sonic the Hedgehog in a Retro Block in the Grim Zone, but Sonic made himself relax and think calm thoughts, which caused the Retro Block to burst.[1]


  1. Sonic the Comic #30, "Metamorphia"