use ground moves against him. i suggest use earthquake if one of ur Pokemon knows it or even use gastrodon against him using muddy water.
beat volkner then talk to jasmine.
Sunyshore city. Beat volkner and go and beat the E4!
by beating volkner
volkner
Well, you have to beat Volkner first, and then try. I am not sure... if that doesn't work... Good Luck!
Volkner
you get it from jasmine after you beat volkner
He is in the lighthouse at the southeast corner of the city
Volkner.
he is only in diamond or pearl or platinum.
i think you get it after you beat the gym leader and you know that woman that you see when you go to the elite four? yes, you get it from her (the gym leader from another reigon)when you beat volkner walk to the beach where jasmine is and talk to her she will give you it
Go to the Sunnyshore city lighthouse up on the elevator , and you will see Volkner !Talk to him and Flint will not be blocking your way!