Gen 1 Type fixes

[Virtual_Porygon]

I'm looking for a patch for Pokemon Red or Blue that fixes type effectiveness. For example Ghost being able to hit Psychic types super effectively and Ice types hitting fire types non effectively

Any demonstration on how to do it myself would also be helpfull.

 

[LusoTrainer]

With pokered it's very simple. Here: https://github.com/pret/pokered/blob/master/data/type_effects.asm