mitsu

Pokemon the movie: the origin of mewtwo. It's about Mew and mewtwo.
Pokemon 2000: the power of one. Is about the legendary birds zapdos, moltres and articuno, and Lugia.
Mewtwo strikes back: is about, you guessed it, mewtwo.
Pokemon 3-the spell of the unown: is about the unown and entei, and a crazy little girl.
Pokemon 4-Celebi,voice of the forest: is quite sad and happy, about celebi and suicune. Oh, and mew's in it. Again.
Pokemon 5-Pokemon heroes: is about latias and latios. It has a sad ending.
Pokemon 6-Jirachi, wish maker: is about Jirachi.
Pokemon 7-Destiny Deoxys (these titles are pretty self explanatory)
Pokemon 8-Lucario and the mystery of mew. Lucario can talk and is psychic for some reason. And yet again it features mew.
Pokemon 9-Pokemon Ranger and the prince of the sea, Manaphy!
Pokemon 10-Dialga vs Palkia vs Darkrai

(i said it in forums, they're going to explain all these confusing legendaries with movies! I'm not surprised!)

And in there somewhere, there is another mewtwo movie, called Mewtwo returns.

With all the mewtwo/mew featuring movies. I'm not surprised they all seem similar! They are for kids.

Bearkong

Its the movie with Mewtwo I think, maybe it is the first one, but I think the first one is called Pokemon the First Movie