Nom the Corpse of Thine Enemyyyy
This was really funny. I liked the bit around half way through with the nyan invader flying by in the mid background; that quick fly by and in-and-out audio while they were seemingly oblivious was pretty funny.
I gave this a 9 rather than a full 10 because I think the dialogue/runtime could have been condensed a bit without losing humour, and because towards the end the voices seemed to change. I don't know if this was due to you recording most of the voice audio in one go, then taking a break and not being able to get the same levels or recreate the voices you'd originally come up with; but it kind of threw me and made it hard to concentrate on the animation and jokes for a few seconds - which is something you'll obviously want to avoid.
Great job overall!