Raph had Spike by his side since he was just a tot, they were inseparable, always alone with each other, and he was the only one who had a pet until one day one of his brothers, the young Michaelangelo came home from exploring their new lair home with a surprise : a tiny baby hedgehog that he calls "Sonic"
When Mikey,Raph,and Casey Jones found out that the world has been broken into pieces,they get themselves involved in a crazy adventure of an lifetime with an blue speedy hedgehog but with an terrifying secret that mikey knows, an high-flying two-tailed smart fox,and an amnesic purple magenta flying chihuahua fairy creature and it all started with an airplane made by their brother
Takes place in the 2012 turtles universe. When Sonic The Hedgehog is trying to get a vaction going, he finds himself teaming up with mutated ninja teens to stop a recent team up of their enemies.
AU: 4 yrs. ago, Mikey had disappeared due to some mysterious reasons, 10 yrs later, he reappears but he has some new friends to keep him company, but he comes back with a whole new look (2k12 series)