Sonic Underground: The Truth Reveals ~Completed~

This will be the Prequel/Sequel to "The Final Victory" by AnyokaDyolf, please read it!

Tails, every Sonic has to have a Tails, right? Well, in Sonic Underground, Tails doesn't exist, right? Who really told the Oracle that Sonic was ready to meet his siblings? Who really told the Oracle that Sonic needed to connect to them with music? Who really foretells everything that is going on? Was there really a Tails in this universe? If so, where is he? What happened to him? Why is't he with Sonic?

Trailer
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Narrator:
Who is the most important character in every Sonicverce? Tails, without him, who knows what would have happened. Sonic Underground? Tails never happened, replaced with sibling, or is he?
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Sonic is running to the Robotnik base from Sonic 2 on the Game Gear with the chaos emeralds and runs to a room
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"ROBOTNIK!" Sonic shouts
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They made a deal, Sonic brings the emeralds, he frees his best friend
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He was one emerald short