An unknown enemy causes the appearance of multiple "time holes", forcing Sonic and his friends back in time. As a result, Sonic must band together with his past self to defeat this enemy and fix the timestream.
Did You Know?
Like the Wanted Poster bearing the cameos of several characters, there are also two Missing Posters of Mighty the Armadillo from Knuckles' Chaotix
(1995) and Ray the Flying Squirrel from SegaSonic the Hedgehog
(1993). Both posters say "Missing since 1993." See more
Silver and Shadow weren't at Sonic's party but ended up in White Space anyway somehow. See more
Dr. Ivo 'Eggman' Robotnik
Take a good look Sonic, it's the last look you'll get, before I close your eyes forever.