Anyone familiar with the dragonball z legendary super warriors for the gameboy colour?

you can change your characters form by pressing left or right like:

Goku > press right> Super saiyan goku and so on.
I would like to implement something like this into my game

now I do know a few things about rmxp, and It may be possible to do this via event, but I don't have the slightest clue on how to assign button presses for certain characters and the alternate forms for that character only.

Like:

agumon> press right> greymon > press right again> metal greymon > right wargreymon < then press left to go back to agumon
while agumon >press down> geogreymon> and so on.

secondly how would I be able to do this from the selected characters status menu?

Or is this too complex for it to be just an event?
cos I was thinking:
if actor is (agumon) >(assigned button is pressed) call common event ( change actor = greymon) or something like that.


If anyone can help me with this in anyway I will be very grateful.

well if you want to do that u have to make a conditional branch and u might wanna make it so whenever they press the button u want them to press to change make sure they are standing on somthing or every time they press that button they will change lol i'll make you a demo for a complete character change event give me a lil bit i'll edit this message with it


Character Button Change event(basic) let me know if u want any changes i can make it wayy more advanced but u just needed somthing simple it seems so let me know if u want anything specified on it like character not moving till its done choosing but ne ways about the event basically you step on that little alter in the demo and it initiates you to alllow change character button to happen this will only work if u have one person in your party if u want it to work with more than one person i'll have to make it more complex and it can be done from the menu i think but it would have to be a skill or an item better than making it a directional button if u ask me