changing the area of the hp and exp etc in battle?

[Pichuichu]

so on the graphics it would be diffrent etc.
^title.

 

[IceGod64]

The data boxes are just images. It you wanted to, you cold literally open them in paint, scribble all over them, and it'd work.
Changing the positions of things such at text and the HP/EXP bars on the data box requires you to rummage through the PokBattle_ActualScene script though.

 

[Maruno]

The positions of the bars are found in the script section PokeBattle_ActualScene, and are all lumped together at the top of the class PokeBattle_Scene (nearly halfway down). Try searching for HPGAUGE_X until you find it.

The heights of the bars are defined elsewhere (in class PokemonDataBox in def refresh). The same place also defines everything else in the data boxes (name, level, status, etc.).