First, go to the top of the lighthouse and talk to Jasmine about the potion. Then, surf west towards Cianwood. From there, head to the medicine shop. The man will hear about the story and give you the potion.
You need to go to Cianwood Pharmacy and get the Secretpotion.
The secretpotion does not exist in SoulSilver, due to there being no use, therefore this question is void.
there is not a secretpotion in Pokemon silver Daniel robertson
You must surf on Routes 40 and 41 to get to Cianwood City. In here, go to the Pharmacy and get the Secret Medicine.
You get it at the Cianwood City Pharmacy. It is used to Cure The Lighthouse Pokemon Ampharos. This answer is right-on. the pharmacy in Cianwood City in the Johto Region, and it is used to cure the ailling lighthouse Pokemon ampharos.
go 2 cianwood city's pharmacy.the man at the counter will give u a secretpotion after u have seen amphy(the sick ampharos in the lighthouse)
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Jasmine? You need to head to cianwood and get the secretpotion form the pharmacy :)
You have to get the SecretPotion from Cynthia.
to the pysducks ;)
Get the SecretPotion from Cynthia
after beating chuck and getting the secretpotion to anpheros