Board Thread:General Discussion/@comment-26873653-20151212201934/@comment-679780-20151224164731

Myself 123 wrote: The more I look at Runners, the more I do question it's canon-ness, Especially considering some of the characters they're adding. Either way, I don't think that renders everything about it null and void. If Sega and Sonic Team has scrapped Knuckles' backstory, I don't think they would've put the Master Emerald in Runners (Or the All-Star Racing games). It's like how I feel about Sonic Chronicles. I don't think it's canon because it's set in the near future and I usually point out the geography is all wrong for Sonic's world.

But the Echidna history and the Gizoids, the concept of Twilight Cage and the story is pretty decent and believe can be worked into canon if done right.