alright, I see two options for you.
1) Have someone give you an ATB Script (Active Time Battle, i.e. FF7)
2) Request that someone makes you a battle system like Valkyrie Profile: Lenneth
Where you press character's buttons and can make everyone attack at the same time, or in intervals, but you can only attack once per turn with each character, then the enemies move.
1 requires RMXP or RM2k3, 2 requires RMXP