Thread:Hanten'in-san/@comment-32173693-20170616164723/@comment-26709288-20170616214104

"You are allowed to do cross overs but do not do them unless given permission by the user of the article or universe you wish to cross over with."

I'm pretty sure in this case they're talking about other fanon stories. And the next link support this: "Same goes with terminology if you want to continuously use them or even use them at all, ask the creator of the term to see if its ok. If not don't use them."