If you mean the Clefairy doll, then you take it to the Copycat girl in Saffron City, Kanto after getting it from the Pokemon Fan Club. If you talk to the Copycat girl's parents, they will tell you where she had it last. The Pokemon Fan Club will be in that City.
When u get all 8 kanto gym badges,I think;~]
you dont, its not in HeartGold or SoulSilver, Ho-oh (HeartGold) or Lugia (SoulSilver) take their place. You can also get mewtwo
Go to Vermillion City and it's on the table in the Pokemon fan club. Just talkto the guy sitting near te doll
The copycat gives you a pass, for the Magnet train (Saffron City to Goldenrod City).
After you get the lost doll from the fan club at vermilion city, Steven talks to you about latias(heartgold) latios(soulsilver). After that, latios/latias will start roaming the kanto region. You can see where it is in your pokegear
in the vermilion fan club
the doll is in vermillion city in the Pokemon fan club
In saffron city, down and right from the magnet train line. She asks you to find her clefairy doll
in vermelion city. the house above the gym leaders
at the fan club in saffron but talk to copycat first
In the fan club in Vermillion City.
In Pokémon HeartGold, to obtain the Copycat's doll, you need to first have access to the Magnet Train, which connects Goldenrod City and Saffron City. Once on the Magnet Train, speak to the Copycat in Saffron City's Copycat house, and she will give you her doll as a gift. The Copycat's doll can be used to gain access to the Magnet Train at any time without needing a ticket.
in virmileon city somewhereits in viridian city at the Pokemon fan clubplease recommend ( if this helps) =]
When u get all 8 kanto gym badges,I think;~]
you go to saffron city and talk to the copycat and she'll tell you she lost the poke doll. after solving the power plant problem, talk to her and go to the fan club in vermillion and talk to the guy with the doll in front of hi
In the Pokémon HeartGold game, the Copycat's lost doll can be found in the Goldenrod City Underground. The Underground is a maze-like area accessible by going down the stairs near the Goldenrod City Department Store. The doll is located on the ground in the southwestern part of the Underground area. Players can pick up the doll and return it to the Copycat in her house located in the southwestern part of Goldenrod City to receive the Magnet Train Pass.
go to the first city in kanto and go to the green house and talk to the guy with the pink shirt and he will give it to you