I really expected someone to guess Jigglypuff. I'm kind of surprised she's recognizable as Pinkie given she has a cupcake on her shirt and not her cutie mark. Wait a second I missed it before, but her cutie mark in on her skirt. Didn't notice that till I was looking at her to make sure she didn't have her cutie mark while making this reply.
No actually we aren't. It's a Party Type. Instead of Electric attacks it uses confetti. It has some physic moves, but just future sight, or the warning ones.
So, does that mean that a Mesprit and a Zapdos combined would make MS-DOS? Because that would explain a lot.