Board Thread:Questions and Answers/@comment-27511601-20161013215409/@comment-860045-20161016141143

Well, one thing to keep in mind is that you have to also consider the handheld version, too. I'm talking about the 3DS ver.; that is.

Sonic Genrations does fit in the main canon. But portable editions often follow their own story somewhat. And this isn't exactly new. Sega had done this kind of thing since the Genesis/Gamegear (and Master System, to some extent) era.

The console/PC ver. of Sonc Generations seems to fit fine. But with the 3DS ver. it has some connection discrepancies. There's too much for me to point out.

But, most importantly, I do believe that is there is two sub-canon timelines in the main series. That is, the console versions and the handheld versions. Both follow their own canon in a way. Correct me if I'm wrong of what I said.