First, before you go inside the gym, if you don't have a lot of Parlyz Heals, your Pokemon will get paralyzed by Volkner's Electric-type Pokemon, so go buy some at the Pokemon Mart. Find a big staircase east of the Pokemon Mart. Go up it and you'll find yourself on a bridge that covers most of Sunyshore City. Go north, then go west until you reach the Gym. Go inside. Go north until you get to a bridge. Step on the green button. Go off the bridge onto the floor. Go around the statues and go onto the other bridge. Press the green button. Head up to the trainer. Battle her. Go through the doorway. Go onto the T-shaped bridge. Battle the Trainer. Go off bridge. Go onto the small bridge. Step on the blue button. Go off and step on it again. Do it again. Go off the bridge. Go up the stairs on the west of the room. Go across the bridge on the gears. Go downstairs. Battle the trainer. Go onto bridge and step on blue button. Step on green button. Go across to the trainer. Battle him. Go upstairs and across the gears. Battle kid in Pikachu costume.
Go through doorway. Battle Trainer. Go across bridge. Step on red button. Go off bridge and onto the other one. Press red button. Head off bridge. Climb stairs and go across bridge. Go upstairs. Battle trainer. Go on bridge. Step on green button. Go off and step on it again. Go across until you get to a blue button. Step on it. Go off bridge and down the stairs. Battle trainer. Go across gears and downstairs. Go onto the middle entrance on the bridge. Step on red button to the west. Do it again. Step on red button to the east. Go off it. Go up the stairs you came from and across the gears. Go up the stairs and onto the bridge. Go across to Volkner. He has a Lv. 46 Raichu, Lv. 47 Ambipom, Lv. 48 Octillery and a Lv. 49 Luxray, so be prepared. If you win, you get the Beacon Badge and the HM Waterfall that helps you on your way to the Elite Four.
get the 7th gym badge
The 8th and last gym is in Sunyshore City.
You will need to defeat Volkner, the Sunyshore City Gym Leader.
You have to have defeated the seventh gym leader in Snowpoint city
you go to sunyshore city and beat that gym leader
To get to sunyshore, you have to get the snowpoint city gym badge.
hes at the top of the lighthouse lookin through binoculars
get the 7th gym badge
sunyshore city dudes
victory road north of sunyshore city but you have to have the sunyshore gym badge to get there
Get 7 gym badges, go to spear pillar, get through distortion world
The last Gym is in Sunyshore City.
The 8th and last gym is in Sunyshore City.
you must talk to him in the lighthouse, in sunyshore then you can go in
Sunyshore City
In sunyshore city
waterfall