I'm no art critic (and nor do I pretend to be one), but I think that this art is fairly good. So many people fail to draw Mewtwo properly, but this looks very impressive. Mew looks a little weird in the first, third and fourth panels, but otherwise it looks fine. The deadpan look on Lugia could perhaps have been conveyed a little better, but given its facial structure I think you've done fairly well. As for the comic aspects, the lead up to the punchline is a little stale (though I'll concede that this was probably done in the small amount of time in which SPARTAAAA was funny xD), and the punchline itself is somewhat predictable. You've captured the beats in panels six and seven perfectly though. xD