Yes, I do ship them together even though they are both from different universes but come on man, if they were both in the same universe they would be a powerful toxic yuri couple lmao :P

Just think about it, also off topic, what I find funny is whenever people draw Cupcakes Pinkie Pie, they draw her with her mane deflated which I never imagine Pinkie's mane to be deflated when she was killing Rainbow Dash I imagine it still being puffy.