Pokemon Divine Sword and Blessed Shield modified for personal use/ need help

[MinecraHD]

So i wanne modify the rom hacks of SwSh and i dont know what each file does, i mostly just want to remove everything the changes the Pokemon Types, Stats, New attacks learned and attacks in learnsets that where moved arround, wild encounters (overworld and random) and also remove the modded TMs. How would i go about it. 
It would be a big help if you could just tell me which to remove, but also the tools used to read out the files would hopefully help. 
I hope somebody can help me