His name is Volkner and he is the gym leader of Sunyshore. To get to Sunyshore travel to the right of Pastoria and lake Valor.
he is the electric leader
electric type Pokemon
Raichu, Pikachu, and Octillery, I think.
you need to defeat the 8th gym leader
8th gym leader
Giovanni
Wext.
electric type Pokemon
Raichu, Pikachu, and Octillery, I think.
The 8th gym leader is in sunny shore city
Sunnyshore City
The 8th gym leader has a LV. 46 Raichu, a Lv. 47 Ambipom, a Lv. 48 Octillery, and a Lv. 49 Luxray
well go to the elitte four- i don't understand your question is it " what do i do after i defeat the 8th gymleader in Pokemon pearl?"
first you have to catch palkia then you go to that place that's across from pastoria and pass the fat guy and go strait from that path
After you defeat the 8th Gym leader you can get HM08 from the Jhoto person standing on the Sunyshore beach.
You can get the HM waterfall in Pokemon Diamond and Pearl by beating the 8th gym leader and talking to Jasmin by the little beach. She will give it to you.
Get a strong ground type (Torterra Garchomp*) or anything that has a ground type move
you go search in safron