Trivia: The background music of the Nocturne is a remixed version of the final boss music themes for 'Sonic and Knuckles' and 'Sonic 3'.
Trivia: Near the end of the game, as the everyone is escaping into their ship, no one is seen carrying the Master Emerald.
Trivia: This is the first Sonic game since Sonic R to have one of the emeralds appear in a different color like orange and pink.
The Maze Runner
In the intro at the very start of the game, it shows Shade being played in Mystic Ruins. However, this isn't possible in the actual gameplay as you can only play Shade after the Metropolis zone, and by this point you can't go back to Mystic Ruins.
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