I had a problem with the script. When the number highlighted in the image is "3", the opponent's pokémon is level 4 in initial battles (when our starter pokémon is level 5) one level lower than my pokémon. And in the final battles of my game, where all my pokémon are level 100 and the battles...
Its a version there's no existis scripts in the scripts editor of RPG Maker XP, the scripts are in the data/scripts folder like this:
Sorry my english xD