by sunnyshore city
where can i find the second gym in Pokemon platinum
in sunnyshore
In the Eterna gym in eterna city.
beat the hearthome gym then the veilstone and then go to pastoria city and battle wake in that gym
In Diamond, Pearl and Platinum 7th gym is in Snowpoint Town.
You can use the GTS in Pokemon Platinum after you get the first gym badge from the Oreburgh City gym.
The fifth gym leader in Pokemon platinum is crasher wake but you get the fourth badge.
This is not possible unless you hack the item.
Route 212 (after winning at pastoria gym)
The Gym Leader of the Snowpoint Gym.
use Pokemon diamond/peral/platinum's effect calculator and find out what the gym leaders weakness is
beat the 8th gym and then go up and there is a person from hoen and also gym leader will give it to you