You first go to Pastoria and find the galactic grunt that is standing with his back to you next to the Great Marsh. it depends on which game you have though. she gives it to you after you chase the galactic grunt out of pastoria and down the route between Pastoria and Veilstone. You Must Have The Pastoria Badge In Order To Get the potion. Yeah she gives it to you in front of the psyduck next to the cafe
Because you need to talk to him and he will move very quickly.
After defeating the first five gym leaders, follow the Galactic Grunt that is in Pastoria City. After you chase him away, Cynthia will come talk to you and she'll give it to you.
well depends on the guy who is he is he team galatic?if its the boss lets just say have a Pokemon at lv 70 if its a grunt just have a Pokemon at lv 20
you travel to pastoria and see a galactic guy there .after beating wake talk to him .he run off .keep following and every time you catch up talk to him .once your outside lake volar he will battle you .beat him and you ll see Cynthia and she will give you a potion .go to the psyducks and use it .
i think you have to beat the Pastoria Gym Leader first
get the secret potion from cythia at valor lakefront after you beat the pastoria city gym battle and defeated the grunt
into the lake. you can't find him until later. you can now battle fantina in hearthome
follow him still dont no where retrace your step how to get to pastoria city
Just at the Entrance of the Marsh, a Grunt will be standing.In order to proceed the story, you need to win over the Veilstone and Pastoria City Gym and Get Dawn's Pokedex back.
in pastoria city after beating crasher wake talk to the grunt standing by the great marsh and he will start running, refusing to battle./ just keep following him
you get secret potion from Cynthia after you chase galactic grunt in pastoria city
The Galactic Grunt in Pastoria City has it. You need to bet the Gym to get it.
You need to deliver the Old Charm that you get from Cynthia to the elder of Celestic town. (To get the Old Charm, follow the Team Galactic grunt who runs away from Pastoria city).
Have you defeated Crasher Wake yet.
Once you defeat Crasher Wake, talk to the Galactic Grunt in front of the Great Marsh. He'll run to the eastern exit of Pastoria City. Follow him there and talk to him again. Again, he'll run off but your rival will appear for battle.
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.