How does a regular gameshark use its codes in the games, anyways? If you don't want to explain it all to me, could you point me in the right direction?
I don't really understand how it can go from a code to a game function without it already being programmed into the game.

basically, I think it alters game variables stored in the console RAM or some modifiers that can change variables. Let says your HP is 80 at game start and you want it to be 255, a part of the hex code you'll enter for that address will most likely contain FF as the last letters. Maybe something different, but I think it may be how it works. And yeah notice how all game genie codes are hexadecimal codes

Thanks. I get it now. It's not quite as confusing as it seems.
That guide is REALLY detailed.

It has been out for quite a while already. It was released 3 months ago (and made front page) on ticalc.org shortly after Ndless 1.0 came out:

http://www.ticalc.org/archives/files/fileinfo/426/42630.html
http://www.ticalc.org/archives/news/articles/14/146/146064.html

Oh ok" Then I'm not sure. Seeing as TI-Boy SE got no update for a year, I doubt gbc4nspire will be updated anytime soon, though, especially that people have yet to figure out how to use linking on the TI-Nspire for third party programs (if it's even possible at all).

yeah it did. I guess time flows fast ^^

I thought that the Gameshark for the Gameboy modified the actual ROM (in which case I don't have to try to recall exactly what I've been doing with the .state files )