The second gym is located in Eterna City and uses Grass-type pokemon.
go to hearthome city
Train it so it can have resistants
You can use the GTS in Pokemon Platinum after you get the first gym badge from the Oreburgh City gym.
Route 212 (after winning at pastoria gym)
Eterna City
The second gym is located in Eterna City and uses Grass-type pokemon.
i can't remember just search around and you'll find out
in sunnyshore
The second gym is in Eterna City. The gym leader is Gardenia, who specializes in Grass-type Pokemon.
by sunnyshore city
In the Eterna gym in eterna city.
go to hearthome city
Train it so it can have resistants
beat the hearthome gym then the veilstone and then go to pastoria city and battle wake in that gym
The 8th gym leader in Pokemon Light Platinum is located in a city called Lauren. You can find the gym leader in the Lauren League Headquarters.
In Diamond, Pearl and Platinum 7th gym is in Snowpoint Town.