At the top of pewter city in the kanto region
take it to pewter museum
go to the museum in pewter city
Get a old amber and take it to a guy in the museum in Petwer City,
Yes there is. It is in Pewter City. Walk to the top of the city and it will be the only building (fairly large) there.
You give it to the scientist in the Pewter City Museum. He is at the right of the room. You can walk out of the building and directly back in to retrieve your Pokemon from him.
There is no best Pokemon on Pokemon HeartGold.
there is no Pokemon Mansion in Heartgold.
In the pewter city museum. to get his attantion you must bring walking latias ( heartgold) or latios ( soulsilver ) with a soul dew from a mystery gift. then he will take you to saffron city. he will talk to you for a while. then he will go back to pewter then show you latios ( heartgold ) or latias ( soulsilver ) outside of the museum. then after you defeat or catch one of eon Pokemon that's the last of him.
in pewter city, the museum has a guy that will restore fossils your mother(sry i mean your father)
They are not in Pokemon HeartGold
where is the pokemon transfer lab in heartgold
u have to get a dome fossil at the ruins of alph then take it to pewter science and fossil museum hope that helps