Fly back to Goldenrod City and defeat Team Rocket.
Blackthorn City, after Mahogany Town and after Ice Path
mahogany town is in the south of the lake of rage east of blackthorn town and in the east of ecruteak city
It's in the cave between Mahogany town and Blackthorn town
Blackthorn city, (east of mahogany town).
Go to mahogany town then to route 44 into the ice to Blackthorn City. It worked for me.
It is East of Mahogany town. Take a look at your map.
You go to Blackthorn City by taking the Ice Path I think.
The Ice Cave is in Johto in Pokemon Gold, Silver, Crystal, HeartGold, and SoulSilver. It is located between Mahogany Town and Blackthorn City, and full of Pokemon like Jynx, Sneasel, Swinub, Delibird, and Zubats. To get there, you first must get to Mahogany Town and that requires HM05, Surf.
that guy with the ragecandybars in mahogany town will let you pass to go to ice path. go through there and you'll get to blackthorn city.
blackthorn
The move deleter in Pokemon silver is located in Blackthorn City.
fail...