Board Thread:Questions and Answers/@comment-26873653-20160823190026/@comment-679780-20160825012118

Sonic 2 GG/MS manual says Sonic got a letter from Tails saying he was kidnapped and he must return to South Island.

However the intro of Sonic 2 shows Sonic in pursuit of Dr. Eggman who had just kidnapped Tails.

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So how is Tails suppose to report of his own kidnapping when it had not yet happened?

Another thing Green Hills Zone from the game looks more like Emerald Hill Zone than Green Hill Zone. So chances are the game may still take place on West Side Island.