You actually have to complete the pokedex or at least get 200 Pokemon for jirachi but that's a s far as i know.....sry.
wait you mean ruby is sinnnooohhh
wait for the next day in real life
You get a ditto and the Pokemon you want to duplicate (cannot be neutral Pokemon like legendaries), then put them in the day care. Wait, and keep talking to the Day Care Man until he gives you an Egg (you will need a space in your Pokemon party), then hatch the egg, and it will be the first evolution of that pokemon.
There will be a remake of ruby and sapphire later on, but for now just wait. They should be making the remake or making the special for black and white.
you have to wait 24hrs
you wait till you have played the game for 100 hours
if you wait a long time you can go to the space center and go to the guy next to the window he will ask if you want to go to space then say yes and you have one chance of catching deoxys on the moon
You wait about it is a little over 12 hours. The more it is shaking the rarer the Pokemon is.
7 days. XD
Sorry, but what's on Diamond stays away from Ruby. Wait. That doesn't really make sense... Whatever. So. I'll 'draw' you a little diagram: Pokemon ----> Pokemon Ruby ----> Diamond Basically, it's impossible to get pokemon, really from ANY ds game, to a GBA game. You can go the other way, though...
You beat 7 people in a row in the battle tower, go to mossdeep city and wait till the guy says launch 100 in the rocket station and he asks if you want to go into space then you say yes and he is there waiting for you
The honey dissapears