Well, you obviously have to defeat Claire, the gym leader in Blackthorn City. Some advantages over Claire are Ice Type Pokemon, and electric types. To get from Mahogany Town to Blackthorn City, defeat Team Rocket in their Hideout, which is secretly in the gift shop, downstairs. Then, you should be able to get past the man who usually wont let you through. Go through the Ice Cave, and GOOD LUCK!
frenzy plant
finish all side quests then go to the city b 4 the lake of rage and that man will let you thru then go thru ice cave
He is in a house in Blackthorn City. :D
ok, you are going to need to go east to route 44, but there will be a man blocking your way and preventing you to reach blackthorn city. you are going to need to head to goldenrod city and beat the rest of team rocket. once you do that, head over back to mahogany town and the man will let you through. you will need to go through a cave called ice path and that will lead you to blackthorn city.Thank youFirst, you have to be in Mahogany Town. Travel east of Mahogany Town until you reach the Ice Path. Travel through the Ice Path until you exit the place, and then you are in BlackThorn City.
you have to of beaten 7 gym leaders for him to let you through if you do and he does the same thing you have a glitch and I can't help you there
you must complete the level with the golenrod city radio tower then the man will let you pass but the gym leader uses raon Pokemon so catch some ice Pokemon on the way
You must first beat the Mohagany Gym, and then buy a ragecandybar from him. Then go to the Goldenrod tunnel and you'll be transformed into a Team rocket fugitive. From there, go to goldenrod tower, follow every step there, and you will receive the Rainbow wing (HeartGold) or the Silver wing (SoulSilver). Then, the man should let you pass into Blackthorn City.
Defeat Clair, The Blackthorn Gym Leader and the Man will let u through.
If you mean Claire in Blackthorn City, you must go through the Ice Path east of Mahogany. If the man is still in the way and won't let you pass go to Goldenrod City again.
Team Rocket is not over yet after you beat them at Mahogangy City. After you beat them, you have to go to the radio tower at GoldenRod City. Then the dude will let you pass.
A man gives them to you in Dark Cave. He's in the northwest corner of the Blackthorn City entrance.