Are Crossover Stories allowed here??

(edit ehh nevermind I see indeed crossovers can be done here so I`ll post at some point if I don`t forget. I am very slow at getting around to stuff sometimes like super slow so meh. I`ll write at some point once I sit my slow self down and focus on writing.)

Hello there all it is I once more so if any of you saw my previous blog post I kinda joined here on a rough start and a bunch of confusion going on due to someone taking a youtube comments debate too serious. That aside I have been checking this site out and I think I might stay on here and post some. This`ll give me a good chance to better my writing skills and try out new formats. So I was wondering if anyone here knows if crossoverish stories are allowed here? Or does it have to be strictly MLP? It is hard for me to explain.

I have a weird case where I have someone who is Princess Luna but not at the same time alright how to put this Princess Luna lives within another individual and they share bodies , but this individual lives in another world than Equestria. I would like to share some writings here but not even sure my stories would even fit in if not then fair enough.