First, enter Sunnyshore City and proceed north until you find the gym entrance. It will be blocked by a red-headed, elite four member named Flint. Talk to him and he will tell you that the gym leader left.
Now, find the lighthouse in the southeastern part of the city. Go inside and up the elevator. Walk ahead and find the yellow-haired, gym leader named Volkner.
As far as your battle goes, he uses the following (electric-type) Pokemon:
Jolteon (male) Lv. 46
Raichu (male) Lv. 46
Electivire (male) Lv. 50
Luxray (male) Lv. 48
Using ground and rock type Pokemon will make this an easy battle, but avoid using water and flying types.
To get to Sunyshore City, you need to get through Mt Coronet and get one of the Ledganary Pokemon Diglia or Palkia. The Gym Leader left the Gym because of a black out that he though was his fault because he used to much electricity. To find him, go to the Lighthouse I think. He will go back to the gym and you can challenge him. Here are the Pokemon he uses. He uses Electric Pokemon:
Luxray Level 46 Male
Jolteon Level 46 Male
Raichu Level 46 Male
Electrivire Level 48 Male
To get an advantage, use rock or ground Pokemon. Water and Flying Pokemon will get badly bombarded if you use them.
Cya Fierykairi.
in the grass in the last city the 8th gym leader
You find him in the last Gym in Sootoolis City.He is the last Gym leader
if you meen the national dex then you need to find every Pokemon in the sinnoh pokedex
you go to sunnyshore city but don't go to the gym go to the lighthouse and you will find the gym leader talk to him and then he will go back to the gym so you can fight him
he is in the SunnyShore City Lighthouse after the black out.The last Gym leader is located in Sunyshore city. His name is Volkner and he is a master of electric type Pokemon. Look out, even if you have ground type Pokemon, because his Pokemon may know ice moves that can wipe out ground type Pokemon.
in the grass in the last city the 8th gym leader
He is at the lighthouse. Bring ground types and stuff because he is the electric leader!
catch dialga the go to sunnyshore
Volkner and he has raichu Electivire Jolteon and i think a Lantern in Pokemon platinum not sure about diamond.
You find him in the last Gym in Sootoolis City.He is the last Gym leader
raichu, ambipom, octillery, and luxray. In Platinum: jolteon, raichu, luxray, and electivire.
In her Gym
if you meen the national dex then you need to find every Pokemon in the sinnoh pokedex
That Pokemon is Shaymin,which is only avadible through cheating or hacking,or a Nintendo Event.
manaphee
you go to sunnyshore city but don't go to the gym go to the lighthouse and you will find the gym leader talk to him and then he will go back to the gym so you can fight him
he is in the SunnyShore City Lighthouse after the black out.The last Gym leader is located in Sunyshore city. His name is Volkner and he is a master of electric type Pokemon. Look out, even if you have ground type Pokemon, because his Pokemon may know ice moves that can wipe out ground type Pokemon.