you need Pokemon that are strong and that an effective advantage over every elite four trainer. to beat the champion u need various Pokemon that have advantage types
go to the sevii islands
im sorry but you cant???????????
Beat the elite Four Beat the elite Four Beat the elite Four
not realy get diffrent types in leaf green to beat the elite four
you have to beat the elite four again then you can look for the legendary dog things
well as far as i know no
Catch mewtwo and you can still battle the elite 4 anytime, but note, they get harder everytime
You have to catch at least 60 Pokemon and you have to beat the elite four including your rival
Go to the cave near Cerulean and got Mewtwo and then I don't know...
u have to go beat elite four then put in leaf green then turn it off it will say migrate from leaf green leave number
There are Pokémon from Johto in Leaf Green, however you can only find them on the Sevii Islands. (That is after you beat the Elite Four)
Pokemon badges in leaf green is a proved sign that you beat a gym. And it makes it so you can battle the elite four or people so call it The Pokemon league and beat the game.