After the battle, Sonic was back to normal, Scourge had returned him to normal. While they celebrated they also mourned. They mourned the death of Scourge. While he was not really there friend, his sacrifice had been heroic, and selflessness. He had saved there friend at the price of his own life and for that, they mourned him.
They had a funeral for him, and an effort to rebuild the city began The damage was pretty bad, all the crystals ripped holes in the ground, destroyed buildings and bridges. Eggman was captured and sent away to prison.
Sonic realizing his love for Amy as she cared for him in his time of need, proposed to her. They married. Had kids. Shadow never married but tails and everyone else did.
The world had found peace, the government realized that a creature like that could mean serious trouble, so the governments of the world came together. World Peace had been established. The future was bright, and everything was going good.
