I do prefer the older pokemon movies myself. such as Mewtwo Strikes back. Pokemon the movie 2000 Pokemon 3 the movie: Spell of the unknown Ect.
however my number 1 favorite is a tie between these two here
Mewtwo Strikes Back (which is alternately called pokemon the 1st movie)

Mewtwo Returns

i have them both on vhs and as they are the ONLY Pokemon Movies that directly tie in with each other (Black and White are two sides of the same movie not a tie together so shut up) as the main legendary from the movie and it explains what happened to Mewtwo and the super clones he created. it also wraps up everything nicely if you watch both movies you'll understand just what i'm saying as i believe those two are without a doubt the BEST two movies you can find of pokemon. and to those of you who don't know Mewtwo Returns was a direct to video release movie where i'm from and i jumped at a chance to see Mewtwo again. It's definately worth the find.