You're in the Kanto region in LeafGreen and FireRed.
kanto
not possible.
there is no way you can reach the hoenn region.
You are currently in the kanto region!
you are already in the kanto region when you start the games
in firered and leafgreen you play in the kanto region
you dont, kanto is the only region
sorry. There is no way to get to johto with Pokemon leaf.
you have to get pass or rainbow pass
Pokemon Emerald takes place in the Hoenn region.
The island of Hoenn is not available in Pokemon LeafGreen, unfortunately. FireRed and LeafGreen are limited to the region of Kanto, while Ruby, Sapphire, and Emerald are currently the only Pokemon games that take place in Hoenn.