Editing Moves with Fixed Effetcs

[JonnyDros]

I've just gotten into ROM hacking, playing around with pk3DS in ultra sun. I notice that some moves have inherent effects that cannot be changed with the standard move editor, the main culprit being Mind Blown. I am trying to remove the 1/2 health recoil effect and it seems it's built in to the move's code. What is the best path forward if I want to change this?

[ABZB]

Figure out Gen VII scripting.