Seaside Island (Mirror Dimension)

The Alternate-dimension Bygone Island is a mirror universe of Team Sonic's universe.

History
Not much is known about this place, but it has its own Bygone Island where Knuckles leads the team against Dr. Eggman. Sonic is the clumsy fool while Dr. Eggman wears green

Inhabitants

 * Alternate Team Sonic
 * Alternate Sonic who is a clumsy fool.
 * Alternate Tails
 * Alternate Knuckles the Echidna who is smart, sophisticated and leads the team.
 * Alternate Amy Rose
 * Alternate Dave the Intern who wields a burger launching weapon and knuckles regards as a genius.
 * Alternate Doctor Eggman who wears a green uniform instead of red.
 * Badniks
 * Bee Bot (multiple)
 * Crab Bot (multiple)
 * Motobug (multiple)
 * Octopus Bot