Umbreon
Houndour
Houndoom
By Action Replay
Darkar is not a Pokemon in HeartGold. Darkrai is a Pokemon, but it cannot be bred since it is a legendary Pokemon. You cannot breed dark type Pokemon, either.
the dark cave is near the sairs to vilot city
Dark Dragonites don't exist and neither do other "Dark" Pokemon in any of the games... but they exist in cards! That's probably where you got the idea.
It's in the dark cave and you need HM SURF
Try battling him with normal Pokemon that know dark moves or just a dark Pokemon ether, either don't matter
There is no best Pokemon on Pokemon HeartGold.
there is no Pokemon Mansion in Heartgold.
You can find an Onix in Dark Cave or in Victory Road in the main game.
Mr . Pokemon is somewhere along Route 30, before you get to the dark cave, earlyer than that! (somewhere around there!) ;)
They are not in Pokemon HeartGold
The Ghost-type Pokemon in the HGSS Regional Pokedex are: Gastly, Haunter, Gengar, Misdreavus, and Mismagius. The Dark-type Pokemon are: Umbreon, Murkrow, Honchkrow, Sneasel, Weavile, and Tyranitar.