You can't unless you hack into the game.
You need to get the Pokemon Colleseum disk. Jirachi can be traded from Pokemon Channel.
Do you mean "Catching" pokemon? If so, you can't. Pokeballs are sometimes mentioned on PNF, but it is impossible to catch apokemon. If you mean Nice cards, look up Pokemon Channel NiceCard List Hope I helped (The only pokemon you technically catch is Pikachu)
no he can only visit you { you cant catch any Pokemon you only have pikachu }
You must have a preordered Pokemon Colosseum disk. Or Pokemon Channel in Australia, Etc. Look it up.
Its a swarm Pokemon listen to oak's channel and he might say its on a certen route
Tune your radio to the Pokemon music channel on wednesdays and search through the grass with the Hoenn music, and you may find one.
You have to get a national pokedex then on Wednesday or thurday (I can't remember one day is hoenn and the other sinnoh) and tune on the radio channel Pokemon music then go into grass at the route north of goldenrod city a catch it there. (You must go to the route first then tune in to the radio channel)
A Weedle.
In Pokemon Leaf Green, you can catch Pokemon in the grass, water, or in a cave.
Yes there are various Pokemon channel emulators that are available for download. Some Pokemon channel emulators are available for free.
you cannot catch the 3 regi's in Pokemon platinum you have to catch them in Pokemon emerald then transfer them to Pokemon platinum. thnx
In Pokemon black you catch RESHIRAM and TORNADUS In Pokemon white you catch ZEKROM and THUNDERUS Sources : myself