Trade it from ruby, sapphire or emerald.
You have to get Regice regrock and regsteel to get the champion bridge it open when you get the king of Regice Regrock and Regsteel to get Regigigas.
uhh i dont know
migrate them from ruby, sapphire or emerald.
You can only get Registeel by migrating it from the Generation III Pokemon games to the Pal Park.
only with a hacking device.
Yes you can trade leafgreen version Pokemon to another leafgreen version.
Not in Pokemon leafgreen only in Pokemon Firered never ever in Pokemon leafgreen And in Pokemon firered it is rare in power plant not available in Pokemon leafgreen?
you don't need regigigas for registeel. you need reegisteel, regirock and regice for regigigas on Pokemon pearl or diamond
Rayqyasa Groudon Kyrogye Latios/latias regirock regice regsteel
Go to the route to the left of lilycove and go above the lake at the very left of that route
you should go to gamestop
On Pokemon Pearl's title screen, if the Pokemon LeafGreen game is in the GBA slot, click on "Transfer From LeafGreen" and you can choose six Pokemon from LeafGreen to transfer to Pearl, but be careful-you can't trade them back.