I just picked my jaw up off the floor,
That was not even close to what I was expecting, and that's a good thing. In a way this flash reminded me of Transformers 2, there was basically just over the top fighting and that's it. The flow of the action was great, but by the time I had sat through half of it it got to the point where in my head I was saying "how much longer can this possibly go on? This is absurd."
The actual art needs work, especially the trainers. The animation itself is very, very well done and the sound effects were apt and satisfyingly brutal. I'd suggest that you work to include a bit more story because it actually gets exhausting to process such intense scenes.
Oh, and this should have some sort of seizure warning, ha.