I highly recommend not to because it can really mess up the game hence the fact of hacking, Although if you have a GameShark or action replay they will not mess the games up the cheats in those are to be helpful like super leveling up you can level up your Pokemon alot faster and such
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It's possible that you ended up hacking your game, that is really the only cause for Bad Eggs in recent Pokémon games. If a hack is possibly a bad or incorrect hack then you could get a Bad Egg.
Pokemon ash grey is not an official game It is a Rom hack of Pokemon FireRed
A hack of Pokemon SoulSilver that makes the game harder and adds new Pokemon not in SoulSilver, along with new game events.
hack the game
i have no idea and isn't Pokemon shinygold a hack game