I finally figured it out:
the battle styles that works are: 0x2, 0x3 and 0x4. The rest freezes the game...
Here's my script:
Please... I want sugestions to make it better, like after the battle ends, I want a way to erase mew sprite in a more natural way...
Note1: The "bla bla bla..." in the text is just example
Note2: I don't know how to put [SOLVED] tag... I'm new in the forum xD