how to create a cheat

please...
as all game codes are released, I would like someone who could explain or make a topic, or if there is already a topic please tell me, teaching how to find and change the grand chase codes in order to create cheats, and learn to handle it
thanks to anyone who can help with this

It's like to create cheat to any other game.
An playlist, how to hacker dishonored 2. But it's the basics of hacking a game with CE (Cheat Engine), a knowledge of assembly will help a lot.
For GC specifically, this video will help, but is in PT-BR (Portuguese)
maybe the steps will be a difference, but the essence is trying to find a value who make something. Like Hp, MP, Cooldown, Monster HP, Rank etc