http://www.gamespot.com/news/2004/10/01/news_6109364.html
Nintendo and sega are not together. Sega and Sammy are together. So Sonic in ssbr is about as rediculous as Sol Badguy, or worse yet, Bridgette, in Ssbr. Furthermore, just because a company makes games on a nintendo system does not mean it is nintendo. The perfect example is Square(which is now Squarenix), Square made final fantasies for the snes and nes, but was far from being part of nintendo.
I am Cylun. May your life be easy and your future ripe.