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
uhh i dont know
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.
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