Ok get the pokemon with virus put him in ur party and walk, after a while everyone will have it when u stop playing deposit ur party. Orelse the next u play they won't have it naymore. Keep depositing ur pokemon after playing until lv.100.
not really i got most of them over wifi.
I catch pokemons and then trade them over wifi for other pokemons.
Never acually made hystory with them excluding elite four.
u can try nothing realy bad like damaging anything will happens.
I do believe it won't work since these games don't have transalation.
U can trade between games from different places that is all i kn.