you need all of the gym bades
Beat the Kanto Gym Leaders CFS
You first have to beat the Elite Four for the first time and then you have to get all of the Kanto Badges and he'll let you pass
you have to beat the pokemon leage
He is the sleeping pokemon blocking the entrance to cycling road and past vermillion city
Complete the pokedex.
You'll need the HM Whirlpool and teach it to one of your Pokemon and you can pass the Whirlpools blocking Whirlpool Cave.
Beat the Kanto Gym Leaders CFS
if you mean in Pokemon diamond/pearl/platinum you need to get the national dex!
You first have to beat the Elite Four for the first time and then you have to get all of the Kanto Badges and he'll let you pass
you have to beat the pokemon leage
get the national pokedex
Use the squirtbottle you get from a girl in a flower shop at goldernrod city.
you can't
Yes you can trade from past Pokemon games...I think only heart gold/soul silver though...
No you cant
He is the sleeping pokemon blocking the entrance to cycling road and past vermillion city
Complete the pokedex.