User blog comment:Nan the cowdog/A important message from Nan (READ)/@comment-33798372-20141215163456/@comment-1647442-20150430181404

Because official crossovers actually happened in canon and are relevant; If we allowed articles for every character that appeared in a fanon crossover, we'd be overloaded. Feel free to write all the crossovers you want, of course. But characters from other shows, etc., don't get articles.