Celebi is an event only pokemon and you have to transfer it through the pal park from a 3rd generation game or trade it from a copy of diamond/pear/platinum that has it already. or you can use an action replay to hack the game and acquire a celebi
There is no best Pokemon on Pokemon HeartGold.
there is no Pokemon Mansion in Heartgold.
They are not in Pokemon HeartGold
where is the pokemon transfer lab in heartgold
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.
No, there are no underwater routes in Pokemon HeartGold or SoulSilver. The HM Dive is not available in Pokemon HeartGold or SoulSilver.
Technically,yes you can get Arceus in Pokemon Heartgold,but only by trading it to your Pokemon Heartgold game from Pokemon diamond,pearl or platinum.
no, but use can use poketransfer from heartgold to white
Pokemon HeartGold can communicate with all the DS Pokemon games. :c)
there are many legendary Pokemon in Pokemon heartgold, but the best is HO-OH