When using Gameshark codes, Game wont load.

[Famousmew]

Hi.
I noticed when you use the gameshark codes and try to load a game, it doesn't load. Even if I open it in a new tab, or disable the code. I just want to change the color of Mario. But the game no like that. I inspect and it shows a bunch of errors. Please help. I am also confused where do I even put the code? Adress or Value? How do you even use it tbh?

[nbarkhina]

You use it like this, here are codes that would make Mario run fast as an example -

[Famousmew]

Oh, Ok. Now it works. I have another question, how do I convert a code like this:
So the first part would be (Example code) 8107EC20 then Value would be the last four numbers?

[Famousmew]

I got it now. Thank you so much!!