in my game each character have the same strengths and weaknesses. they all change class at the same time. the problem however is that i cant figure out how to change their battle sprites after changing class. i am using the same classes for all characters so the default method would require way to much work. i will rather use script to change battle sprites. though i dont know how. please tell me.

I don't really use the battle system all that much but as far as I know they're going to share the same battle characterset if they have the exact same class. You might need to just make copies of each for the characters, so you have one class (Fighter) which has one version for each character you have. So there will be a lot of classes but I guess it will have to do. You can't change just the battle characterset for each.

The classes from Fighter to Thief are all the Male/Female versions of the classes for the 1st character. Then multiply that by 4 (for 4 characters).

i was able to manually set each character`s battle sprites different in the database editor. (each character share the same initial class but have different battle sprites.) that means that they arent entirely bound to class. please help me with this.

IF THIS IS USED BY COMMON EVENTS IN THE COMMON EVENT THIS IS WHAT YOU SHOULD HAVE:
>Contindtional Branch(PAGE 3)
If Variable ALUXESCLASS = 2 (1:Knight 2:DeathKnight 3:Dualist)
Go on page 4
Select the actor (For me its aluxes in RPGMAKE2003)
select the class
now the actor will be that class until he's/she's variable goes up
(Be advisde,after each battle (if your using the sideveiw Battle system)make sure you select add viarable if win or he wont go up classes
THE EVENT SHOULD BE CALLED AFTER EACH BATTLE)