Meh...
It was alright I suppose. The animation was okay I guess...but I felt that you were a little too dependent on the sprites themselves. Instead of simply moving the sprites back and forth perhaps you could provide a little additional animation (gestures, expressions, specific actions...etc.) to the sprites for a smoother and more unique animation. As for voice acting, I found it rather dull (minus Prof. Oak...I actually thought he wasn't half bad). I believe that if you put a little more emotion into the voices, then your characters would really come to life and be more enjoyable. Presentation wise, the story was relatively fresh and flowed pretty nicely for the most part. Unfortunately I did not care much for your jokes, I found most of them to be quite stale and unoriginal...sorry.
Also it was somewhat annoying to have to click that little arrow to keep the movie going whenever it came up. At multiple points I found myself staring at the screen for a few seconds waiting to see what would happen next, only to realize that I had to click the arrow to continue the story. This didn't totally kill it for me but it was slightly inconvenient and disturbed the flow of the story.
Overall, everything about this movie just fell a little flat in my book. A few simple tweaks here and there could have made this flash a lot more enjoyable for me. Or maybe I'm just being too picky...