This one http://bubbz.pocketheaven.com/?system=gba&section=patch_info&patch_id=1224

Sure, You guys can just give me a tool for patch reading and such... I guess that Notepad doesn't works for patch reading >_>"";
Meh, Don't need to modify for me, just say me a tool for patch modifying/making...

Yes, I searched at the "Getting Started" section, but I didn't find anything about modifying a patch.

Oh, and is, by any chance, modifying a patch Illegal?(Not illegal as a real law, I mean, is it against moral values?)

I would consider hacking a patch just as immoral as hacking a ROM. The degree of immorality that carries is up to your conscience. To me, either way you're editing someone else's work, and it really doesn't matter who the work belonged to in the first place. I'm sure that others may feel differently about this than I do.

As for your patch file, a hex editor and a document or two on the IPS file format would serve you well.

Hacking a patch is like hacking a ROM. Legally, it's a grey area. Morally, the arguments various people make are all over the place. Some claim that hacking ROMs and or patchs without the author's permission is wrong. Others claim that either is fine. Still others claim that hacking ROMs is fine, but hacking ROM hacks is wrong. This last opinion is hypocritical and silly.

The one thing I would say is that you should give credit where credit is due. Hacking a hack and not crediting the original hacker would be like hacking a ROM and claiming it was a homebrewed game.

If the author of a patch gives you a hard time for reusing his work, first, call them silly. Then release a patch that is applied after thier patch to impliment thier changes. This is the same way ROM hackers avoid copyright issues in the first place and works equally well for hacking hacks.

Sorry I don't know of any patch editing utils. I'd suggest simply applying the patch, hacking the resulting ROM, and making a new patch. If you don't know where in the ROM to hack, a good IPS util will tell you as it applies the patch where changes where made.

I wrote a small utility program a few days ago that turns reads an IPS file and prints it out in a human-readable format, but it's not suitable for public release yet. You can also take the original ROM, copy it, apply the patch to the copy, and then use Translhextion's "Compare from current offset" feature to get a list of all the changes. However, this only gets you the address of the first byte changed in a sequence and the number of bytes altered, not the new byte data.

If you're going to use someone's work, it's polite ask permission to the author. But if, for some reason, you are unable to do it (or don't feel about it), so at least give its due credits to them. this last thing is definitively needed, else you'll get flammed in your ass.