How do I change critical damage?

Crit damage is normal damage x3 in vanilla FE8. How can I change so that it’s normal dmg x2 instead? I’ve looked around in FEBuilder but there doesn’t seem to be an option for this.

You would need to do some ASM.

ASM is about code manipulation and whatnot, right? I have zero idea about that… Can’t you tell me what values I need to change and where?

I think you should look at SNES crits for GBA by Colorz, it might give you a clue