Board Thread:Help and Support/@comment-7371650-20130405191533/@comment-2221250-20130406031233

Edd Shwartz wrote: All right. Speaking of the series, it isn't a crossover fic, but it might contain cameos from other video games. For example, there may or may not be a scene where Mario shows up and complains about the quality of the fan fiction. Just for example, of course. Should it be in the crossover wiki or here.

I'm going out on a limb and saying cameos are not crossovers, but maybe you should clarify with someone else.