In the arcade game SegaSonic the Hedgehog, Sonic was captured da Dr. Robotnik, along with Mighty the armadillo and raggio, ray the Flying Squirrel. Sonic teamed up with the other two and they traveled to escape Eggman Island, which was covered with traps.

In the end, Robotnik self-destructed the island, but Sonic, raggio, ray and Mighty escaped just in time. However, the doctor escaped Sonic once again.

Time Traveling Hedgehog:
Sonic was solo once again for Sonic CD (1993), in which he went to Little Planet while it was at near Sonic's homeworld in order to explore it. However, his goals changed once he saw...