Mimicked the show well
That was pretty good, the drawings were anyway, and the voice acting. (It seems like you used clips from official Sonic stuff, except the part with him and the ugly kid from Sonic X) Personally, I hate Sonic X, I think it ruined the animated adventures of my first favorite video game character, but the idea, having something like this before every episode on your site, is a pretty sweet idea =). I probably won't watch the episodes, but I will sure as heck watch these.
Also, make sure when you do tweening animation like when the dude and the girl were behind the desk, make sure the line wraps all around whatever part of the body that's on the bottom layer.. Like when you had the guy's arm moving, there were parts where the black line was missing, it looksmore pro if the tweening blends without gaps in the linework. (I hope I said that in a way that makes sense) Peace.