Deppends on what you mean by 'hack'. One may use the ds Action Replay to cheat, but to litteraly hack the code would be near impossible.
i dont realy know but there is some one i no who can so ill git back to you on that
Yes, but it's a hack for Pokemon Ruby. though, I do not know the hack
to get a hidden machine for Pokemon sapphire you have to..... ask someone else because i don't know
I do not believe there is a mawile in sapphire. Otherwise no i don't know where to get one!
Sadly, kygore is only available in sapphire and emerald. To get kygore in ruby, u need to either trade or hack (im no good in hacking so i dont know how)
Well, I don't know but you can ask a friend
As far as I Know Chansey is not on the Pokemon Sapphire you can trade it from other versions like fire red or leaf green
you can not. you can only use advance map to hack fire red, leaf green, emerald, ruby, and sapphire. but there are editors for gen 2 games which are gold, silver, and crystal although I don't know any off the top of my head.
uhh i dont know
I don't think Roselia evolves in Pokemon Sapphire, but i do know that it evolves in Pokemon Diamond and Pearl. If I'm wrong please do tell ASAP. Thank You.
i know of bad egg and missingno
it was an event