This group 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.
The Phantom Finders are a group mentioned in the Sonic Boom television series. It is a community of power-drunk pre-teens with their own message board and an interest in supernatural encounters.
Dr. Eggman was once a part of the Phantom Finders, but was banned from their message board by the mods under unknown (and supposedly unfair) circumstances.