The person who makes groups is at the school at Violet City.
yes. at Pokemon day care if they have to same egg group.
There is no best Pokemon on Pokemon HeartGold.
there is no Pokemon Mansion in Heartgold.
With another person yes, and at the trading post es, but with NPCs? no.
They are not in Pokemon HeartGold
you have to go back to your moms house
Meet with them in the union room inside the Pokemon center.
where is the pokemon transfer lab in heartgold
HM01 Cut is given to you by a person in Ilex Forest.
No, but you can trade Pokemon only in HeartGold to Black
Aura Beam is in Pokemon HeartGold.
That is impossible in Pokemon HeartGold and SoulSilver.