Sankaku Channel/shared universe crossover

A 'Crossover' with characters and copyrights by same franchise (such as yu-gi-oh! series) or of a studio that say, produces comic book super-heroes (marvel, d.c. etc.). Could 'possibly' apply to works by same artist or of a studio that produces multiple anime/hentai/doujin etc. Can be totally random.

Child of the following tags:

クロスオーバー