you must talk to him in the lighthouse, in sunyshore then you can go in
you go to sunyshore city and beat the gym leader
beat all gyms or cheat with ar ds
After you beat the gym leader in sunyshore city,go to the top of the beach near the cave. Jasmine. She will give you HM 07 WATERFALL! :D
use ground type
you automatically get it if you walk north in sunyshore city. However, you must beat Volkner first.
No. You just have to save Uxie, Azelf, and Mesprit, and beat Giratina in the reverse world. then, they'll let you go to Sunyshore city
When you go to sunyshore city to battle the last gym leader after you beat him you have to go get the move waterfall from jasmine who is the girl on the sand. Then you use surf on the water behind her which is route 233.
You can get to it when you have beaten the Team Galactic leader (at Mt. Coronet) and fought Palkia (Dialga in Pokemon Diamond and Giratina in Platinum). After that, the person who stopped you from entering Route 222 isn't there anymore and you can beat the Gym, then go to the Pokemon League!
beat 50 trainers
beat gym leader Candice
I think you have to beat the seven gyms before it ( The Eighth is in Sunyshore ), save the Pokemon of the lakes, get to the top of Mt. Coronet, and catch Palkia before you can get past the man.
tecnically in sunyshore or other city, but then you need to beat the elite 4 in the pokemon league, past that city.