It's extremely unlikely unless something inexplicably lethal is coded, however hacking games sometimes has a fair chance of damaging your game, which as a result may require a fresh reinstall.
No, but it can mess up the game itself.
hacking but it could mess up your game
No
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
If you throw it hard enough, and your aim is good, it will REALLY mess it up.
No
Without any sort of event or hacking device, Arceus is impossible to obtain. Of course, trading is always an option.
No But They Can Mess Up Your Game
Yes. people put time into making sites and games and if you hack it you could really mess it up
it can but very rarely
It shouldn't. Pixie Hollow is surely virus free. You should contact the site for more info.
Not that I know of, but it might mess up your game if you input too much.