to hack different games you need different kinds of tools. You can hack NDS, VBA, and GBC roms. For hacking tools go to the link below:
http://wahackpokemon.com/en/download/tools-gba
no you dont destroy your game.
Go to gamecheats.com it will go through the steps with you on how to hack
quartz version is illegal and i have no idea how to hack a new Pokemon game
You can't unless you hack into the game.
You could hack the game by using an Action Replay.
by using a game shark
Http://romhacking.net
Pokemon ash grey is not an official game It is a Rom hack of Pokemon FireRed
impossible mewthree doesn't exist maybe in a hack (a fake hack).
The FireRed Pokemon does freeze on your Shining Opal FireRed hack game because your RAM is low.
I'm pretty sure its a rom hack of pokemon emerald, but you could hack the game and download it onto an unused ds cartridge
hack your game