There she is, It's Rainbow Dash.

That's just nature kids

a pink stallion

Luna is forever internaly screaming

Fluttershy booping Rainbow Dash on the nose

Moon dancer

a pineapple pony with pineapple juice

Orange Jack. Cuz why not?

Celestia has become possesed by the devil, she is drinking the blood of her enemies and is saying to herself "so classy!"

a brown horse

pinkie pie as a cat

Rarity is not beautiful enough