User blog comment:Iamthelegion/Eragon vs Harry Potter - Legion of Rap Battle Sagas/@comment-25036892-20140827021336/@comment-26261279-20150106230043

"Possibly excluding cameos, no battle should have more characters than can be counted with one's fingers (on both hands, so therefore ~10),"

And then Ghostbusters vs. Mythbusters happened, well, only counts if you count Janine's cameo as rapping.