I love the self aware Nintendo system, that's so funny and clever. I also like how he was drawn, just two things I need to point out...
When his mouth is open, the outlines of his ears turn dark brown, then when his mouth's closed, goes back to black... At least I think so, something weird is going on with the ear outlines when he talks is all...
Also, are you aware that Flash has a Pixel brush add-on? It's free, I'm sure...
I like the way he's hand drawn though, I just thought you should be aware of that option.