Ha, that was pretty awesome. I like how they kept all the lame jokes in the episode. 'The early work gets the bird, or in this case the Pokémon!'
The fact that the Y is accented is also a neat touch.
But I think they let nostalgia and weird Garry's Mod physics replace jokes instead of helping them. That won't carry over to a lot of episodes. Eventually it'll just become a gimped Pokémon remake.