Pretty good.
I've seen my fair share of well-animated Pokemon shorts on this site that ranges from the situations and areas in the games to the battles that took us a while because of difficulty or the amount of trainers we had to face. But either way, this was well animated in terms of the pokemon's movements and the way the camera changes. Though I just hated the irate shorts guy for several reasons. He was an overall annoying guy, which I guess was the intention of this because he acts like it.
I also thought the way his eye looked could have been a bit more psychopathic, too. Not just in the eyes, but in mouth too.
I also think some shading could have been used for the background or characters.
Other than that, I loved this.