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This location exists primarily within the Sonic Boom 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 Seaside Island (alternate dimension).

Seaside Island is a location that appears in the Sonic Boom television series. It is an alternate version of Seaside Island from the Mirror Dimension.[1]


TV series


Not much is known about this place, except that it has its own Team Sonic, led by Knuckles the Echidna, who has protected it from Dr. Eggman.[1]

Season one

During Eggman and his Octopus Bot's battle with Team Sonic on the island, Knuckles got sent to the Sonic Boom World by Octopus Bot by accident. Fortunately, Knuckles returned in time to help Sonic when he was cornered by Crab Bots.[1]




  • Sonic's Shack[1]


  1. 1.0 1.1 1.2 1.3 1.4 Moarbes, Charles-Henri (23 July 2015). "Two Good to Be True". Sonic Boom. Season 1. Episode 35. Cartoon Network.
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