Your game and your system use 2 different tipes of wifi. Check your games wifi settings and connect to wifi by booting up Pokemon heart gold and select wifi settings and tweak them!
You can transfer Pokemon, but you can't trade. Since HeartGold was released before Black, HeartGold doesn't know Black exists. However, Black knows HeartGold exists. You need to be on Route 16 in Black version, which requires beating the Elite Four.
Yes DS's are multi-regional.
I'm afraid not.
mew
No
Silaqueen is not an existing Pokemon. It is not found in HeartGold or any other version. It will be found no where.
Ledyba is not catchable in Pokémon HeartGold Version.
Pokemon HeartGold and SoulSilver.
You can only go to Johto and Kanto in Pokemon Heartgold and Soulsilver
The only way is to throw away your Heartgold version, buy the original Red version, and play a real Pokemon game.
no
yes