Coliseum normal battle

Open up a hex editor and go to C2/0933 and change the byte to $00, so that the instruction becomes D0 00 (BNE $0934).
You still had the header applied when you went to C2/0933 evidently... Are you maybe confusing when the ROM is headered and when it's not? Use SNEStuff to apply or remove the header to be positive: https://www.romhacking.net/utilities/841/

Got it. The rom was unheaded when I was using the HxD & SNEStuff. Unfortunately, I did not spot the D0 part until a few hex down the line until later. (sigh)

But anyway how to remove item or other commands that were originally cannot be used?