Thread:Myself 123/@comment-4220590-20150605142014/@comment-477304-20150605155259

"This is primarily a Sonic wiki, but we permit a small number of non-Sonic characters to have pages. Such characters must have appeared in at least two games, two comic books, or two episodes of a television show in which Sonic was a main character. Cameo appearances do not qualify as appearances. This includes crossover games, comics, and television shows, but excludes those in which Sonic merely made cameo appearances."

We decided that Smash Bros. series does not count as Sonic cannot be considered a main character in those games. Additionally I personally would consider Link's appearance in Lost World as a cameo, so that shouldn't count either.