Uhhhhhhhhhhh

How do you make a pokemon battle system for RM2K3? This is also driving me crazy!

unless you are 'super 1337 teh H4xx0RR!1111' that would be quite impossible
(you'd have to hack the .exe and change it that way)
because there is no open-scripting access

You can make a perfect Pokemon type battle system with events, but it will take time and effort to do.

Could you tell me how you should know im new to this kinda so i dont know how to do that.

There are a lot of Tutorials out there, but even with them it can be tedious.

yeah, well through eventing a similar system may be possible, but it won't be exactly the same
(for example, battle commands)