Board Thread:Site Discussions/@comment-4533965-20140409023013/@comment-4533965-20140409114810

Slug-Drones wrote: Mario and Megaman have some specific interactions with Sonic. The other Mario characters have their pages because they have some relationship with the other Sonic characters and that they have their own unique stats in a game where Sonic is the main character - Mario & Sonic series

As for Smash Bros. Sonic is just an extra playable character. He has no interaction with any of the Nintendo characters other than looking at them in the trailers.

Basically, if a character's article has nearly nothing to do with the Sonic franchise other than just being there in a game I don't see why they would need a page.

Therefore, I think that Link, for example, shouldn't have an article. So basically they can get an article if they interact with Sonic in some way? If so, then it makes sense.