So just message me a bunch of ideas, and here are the fandoms I'm in off the top of my head

-Gravity Falls
-Ninjago
-Fullmetal alchemist
-Maximum ride
-Young Justice
-Batman in general
-Avengers (yeah, yeah I know)
-Undertale (any au)

-Attack on Titan

-Percy Jackson
-How to Train your dragon

I'll add more as I think of them!
I can also do regular stories.  Give me the plot, and I'll make you a short story!  I'll put your username in it so people know the idea was yours, not mine.  Happy reading!