>>46931172>Pokemon Green (Helix Chamber)What is that? A hack? Cheat codes are unlikely to work with hacks. I can help you, but I don't use mGBA, I prefer BGB, so I'll give you instructions for that instead. I rarely ever look up cheat codes, because editing memory directly is easier for most things once you learn how to do it. And it is easy to learn.
>open BGB>run game>right click on game>select "Other" and then "cheat searcher">click on "this value" and enter how many coins you have in the game>click Start>get or lose some coins>change the value to match the new amount>click search>repeat the last 3 steps until the big white area above only shows about two or so values>right click on the value you want to change and then select open debugger>a new window will open, the value will be selected in the bottom section>right click on the value, select "modify code/data", enter the amount of coins you want (in hexadecimal)>press "ok"Now you know how to cheat on your own.
If you don't get my short explanation, look up "cheat engine tutorials", it's the same thing.