Board Thread:General Discussion/@comment-1031724-20160828014723/@comment-679780-20161025191404

Josh366lol wrote: Not bad on the timeline, but few issues. Sonic CD takes place before Sonic 2 as it was in development before Sonic 2, even though Sonic 2 did finish before Sonic CD. In Sonic Battle, Shadow has no memory, how is that explained, plus how would they have met him? If Sonic Rush is in the alternate timeline, then how is Blaze at the party in Sonic Generations? Sonic Chronicles should be taken out as that game is really unrelated with the other games. Well, it can be a matter of two things.
 * You are correct, it does take place before Sonic 2 given Tails was not mentioned in either manuals.
 * Sonic CD was made between Sonic 2 and 3 could of happened somewhen before Sonic went to Angel Island.

I've been meaning to revise my timeline, so I believe the former choice could be more accurate.

As for why Shadow has no memory, he looses it more often than I can count.