If you play Diamond or Pearl, you'd be heading towards Hearthome Gym, but if you're in Platinum, you'd be going to Canalave Gym.
Pastoria city
Go to the pastoria gym
pastoria city
it's in pastoria city.
grass electric
Pastoria city
in pastoria near the middle
you have to beat maylene then go to pastoria city and look for the gym building
The safari. LOOK!!
thhen you need to start over
When you exit the Pastoria Gym and talk to your rival and Crasher Wake go to entrance of Pastoria. Talk to the galactic grunt and he will run away. Keep following him until he's right next to the entrance of Lake Valor. He will then battle you.
run around pastoria city until you find it
You go to the Hearthrome gym
im not sure but i know it is to go to canalave city or go to the hearthome city.
i think you have to beat the Pastoria Gym Leader first
Make sure you battle everyone else in the gym and you will get it.
pastoria city