[ASM & Hex✓] [Emerald] How To Lift the EV Cap from Vitamins (from 100 EVs to 252 EVs)

[ShinyTillDawn]

After looking through https://www.pokecommunity.com/posts/10134604, I finally learned how to do this procedure in Emerald, and I had to go through a lot of installations just to find the offsets in Pokémon Emerald regarding these.

And it's these:

Offsets 0x6c468, 6c470, 6c476, 6ca54, 6ca5c, 6ca62

You have to change the 63 bytes you see to FB in those offsets, along with changing the 64 bytes you see to FC. This way, you should be able to gain 252 EVs via only vitamins.

Edit: Here are the offsets for how many EVs the vitamins give:

By default, it's 0A for 10 EVs. Here, it says 40 for 64 EVs.

 

[Ryurs]

This is excellent! But I have one last question: What about the EVS reducing berries?

What is the compensation that makes that instead of lowering 10 EVS, it lowers another value that I set?

 

[ShinyTillDawn]

This is excellent! But I have one last question: What about the EVS reducing berries?

What is the compensation that makes that instead of lowering 10 EVS, it lowers another value that I set?

I don't remember which offsets in the game's code I had to edit, so you'll have to find that out on your own. An important skill in binary hacking is editing certain constants in a Pokémon's disassembly (for Emerald, it's pokéemerald), then compiling a game. Some values in certain memory addresses will not match the original game, so you use a binary difference tool to locate them. You can document a lot of things to help other binary hackers with this skill!

Here's how to do it:

Spoiler:

1) Familiarize yourself with decomps (you don't need to make a decomp hack) using this website: https://www.pokecommunity.com/threads/432351
2) Make a folder and clone pret's pokéemerald repository
3) Go to [folder name]\include\constants\item_effects.h
4) Scroll to where you see this:

5) Edit those to whatever values you want.
6) Save the file.
7) Compile (see the above link for the tutorial) a game with the files from the decomp.
8) Install vBinDiff (google it)
8) Put a vanilla Pokémon Emerald file and your compiled file into the same folder where the vBinDiff executable is.
9) Open Windows PowerShell and type ".\vbindiff [name of unmodified game].gba [name of modified game].gba"
10) Hit Enter to go through every difference in the file. There should be 6 or 12 differences.

 

[Ryurs]

Hi! Thanks for replying, although I had already done more or less what you indicated in your post. I haven't responded earlier because I'm on vacation (in fact, I'm writing this from my cell phone).

Indeed, I used Decomp with pokeemerald to look for something like that; to be able to change the value and then compare it with an original rom using HxD, and see which bytes are necessary to change. Actually, if you already have Decomp tools installed, it is quite simple and useful this method. Even if your trick is in rom hacking binary, you can get a lot of things out of it.

Back to the topic, I found the necessary offsets to change the values that subtract the EVs of each of the berries (they were 6 bytes, similar to the vitamins offset). But I found a problem with this, and it is that the maximum that I could put that they subtract was -128 (I wanted them to remove all the EVs of the statistic that corresponds to them, that is to say, -255 for each one of them). Even putting a value of -129 in pokeemerald, it wouldn't let me compile. I guess it has to do with something to do with the game's own internal calculations.
In the end, the solution I came up with was, through a bit of C programming and scripting, the creation of 6 new items that do this function of leaving the EVs at 0 depending on which stat it is.

Greetings and happy hacking!