The first Pokemon movie is the only truly good one.
Second was mediocre. Third sucked ass, big time (Unown? Who gives a shit?). Fourth was same as second. Fifth was okay. The only good ones after that is the Lucario one and the Dialga and Palkia one, and they're not as badass as Mewtwo Strikes Back. Mewtwo was badass.
Some of them are just awful, like the one with Deoxys and that little pussy afraid of Pokemon. Like Rayquaza is going to job that badly to Deoxys. God, what a shit movie.