[Other] I'm trying to make a patch for Platinum but don't know how to start.

[Vagabond+]

I'm trying to make some edits to Platinum. The idea is to make the game more difficult but still have every pokemon legal. The ideas I currently have in mind are:

1. Edit wild encounters to include Dual Slot, Swarm and PokeRadar exclusives naturally
2. Team buffs to trainers to make the game harder
3. Learnsets become more strategic and interesting, allowing for the tools to fight the harder bosses.

I could easily do these things with ROM Editing tools I'm familiar with, but that would change the base game of course. Can't legally distribute the changes in that case. However, when I google "how to make a patch" followed by whatever specific key words, I just get results about how to patch a game with an already existing patch instead.

I *think* the changes I listed are simple, so can I be pointed to a tutorial/program that helps me?

 

[Vagabond+]

Nevermind, I figured it out. Really simple.

 

[ComatoseCow]

Nevermind, I figured it out. Really simple.

I feel like I am missing it how where you able to do this?

 

[Anon822]

I feel like I am missing it how where you able to do this?

Usually the same programs that apply patches also have the option to create patches.

 

[hjk321]

rompatcher.js lets you do it right in your browser. Both patching and patch creation.