you get the tea from the old lady in the city with the casino and you give it to one of the guards near saffron city and then all of them will let you through.
You get a Kanto starter, unlock Groudon and Kyogre, if you go to Silph Co you get a Hoenn starter, and I think that's it.
If you are playing heartgold or soulsilver , you need a physic or ground type pokemon.
Johto and Kanto
To get a Pikachu in Pokemon SoulSilver, you must go to Viridian Forest, which is in the Kanto region.
Pokemon HeartGold Will Have Sinnoh,Kanto,But Hoenn Least Likely.
Johto Kanto (from Pokemon LG&FR)
Get a kanto starter :p
the top of kanto
johto and kanto
Johto and kanto
Yes it is in the kanto region.
You can only go to Johto and Kanto in Pokemon Heartgold and Soulsilver