Last time, I had the following script to give the party a random item from an item pool when opening a chest. Then, I tried to make the item that the party receive to be removed from the pool and replaced with something else. So I add the following line. Apparently, array is static and can't be changed. Stack overflow told me to use arraylist since it is dynamic, except that I don't know how to implement it inside rmmv. Please teach me!