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The Seaside Island of the Mirror Dimension.
For years, it's been theorized that a Mirror Dimension exists parallel to our own.
— Miles "Tails" Prower, "Two Good to Be True"
The Mirror Dimension is a location that appears in the Sonic Boom television series. It is an alternate dimension existing parallel to that of the Sonic Boom World.
Description
The Mirror Dimension is nearly identical to its counterpart except that its residents are polar opposites from their Sonic Boom World counterparts personality-wise, though not necessarily in terms of alignment, and some miniscule physical differences. Its existence has been theorized for years by Miles "Tails" Prower.[1]
History
TV series
Past
Much like in the Sonic Boom World, the Team Sonic of this world has continuously fought against the villainous efforts of Dr. Eggman.[1]
Season one
When Knuckles got sent to the Sonic Boom World though, the Mirror Dimension was in danger of imploding from the eroding barrier between the dimensions caused by Knuckles' departure until the Tails from the Sonic Boom World sent him back.[1]
Inhabitants

Dr. Eggman wearing green is the only aesthetic difference from the Sonic Boom World.
Locations
- Seaside Island
- Seaside Coast
- Sonic's Shack
- Seaside Coast
References
- ↑ 1.0 1.1 1.2 Moarbes, Charles-Henri (23 July 2015). "Two Good to Be True". Sonic Boom. Season 1. Episode 35. Cartoon Network.