Sonic and Shadow are an official couple, OMG. That said, they're still constantly competing against each other, because they love a challenge. :P Speaking of Shadow, he and Rouge and Omega are a successful team with a respectable career under a reformed G.U.N. Team Chaotix finally makes it big and never worry about going broke again, and Vector and Espio adopt Charmy, and Mighty is free to roam the world without worrying his teammates are starving. The Chaotix and Cream's family hang out, and Cream has a jillion friends. Blaze and Silver can go back and forth between their homeworld and their friends' world so no one can be separated by time and space. Eggman decides to retire from the Evil Supergenius business, but still harmlessly pesters Sonic for old times sakes, because old habits die hard.

And there is Chao. Lots and lots of Chao.