Basically, -just- and I use the term loosely, obtain all Pokemon obtainable in Emerald/ruby/sapphire, on such games, then choose a johto starter (Birch will call you) and trade. Only way, sorry.
Chat with our AI personalities
Not any hoenn Pokemon but firered and leafgreen can catch alot of kanto and johto Pokemon ruby and sapphire can and can't.
You can't get to the johto region in firered.
you either have to trade with a friend or use an action replay code to catch another trainers Pokemon.
You can the Pokemon from the johto region once you have the national pokedex. To get the national pokedex, catch 60 or more Pokemon from the kanto region then go and see prof. Oak in his lab in Pallet town.You can't.... But you can get johoto Pokemon in the game and from Pokemon colluseam.
Pokemon Soulsilver and Heartgold has the 3 original starters, which 1 of them can be obtained after getting 16 Gym Badges. (8 from Johto and 8 from Kanto) For GBA, which also can be in the DS (Not in DSi and the 3DS family systems, though.), it would be Leafgreen and Firered.