Adding NPCs, editing marts

Hi,

Game: Inclement Emerald

I would like to add an NPC/edit a mart in the same way the Nuzlocke Patch from toxic does:
https://drive.google.com/drive/folders/1nGP7VQdaOHG9-LH4_nRCUos811uRzZTJ

This enables you to get Rare Candies, other stuff and save the major grinding when adding new members to your team in a NL run.

I already downloaded the decomp emerald but i have no idea how to create a patch like toxics NL patch for the current version of IE

Thanks