The Cogwinder Retractable Partulent Corer or CRPC for short, was a tunneling device invented by Doctor Ovi Kintobor. He used it to search the depths of Planet Mobius for emeralds that he could use in his attempt to purge the planet of all negative energy.

NotesEdit

• The Cogwinder Retractable Partulent Corer was, like the Retro-Orbital Chaos Compressor, created by Sega of America for their version of Sonic's backstory. It was mentioned in the Stay Sonic guidebook, but unlike most of the concepts introduced there, did not make the leap to the pages of Sonic the Comic.