Well you can't catch it in Pokemon Heartgold though if you have the Pokewalker you can catch it in Quiet Cave a Pokewalker Route
You can't catch Arceus in Pokemon heart gold. You must bet it from Pearl, Daimond, or Platinum.
Heart gold I think so gold no
You cant
on fridays
no
no
In Pokemon heart gold Cubone is found in Rock Tunnel and Safari Zone
You can catch MEWTWO ,not Mewto, at the end of Cerulean cave
You can catch dragonair in the dragons den (blackthorn city).
the only way you can get regice in heart gold is by trading from Pokemon platinum,diamond and pearl
You Can't! in Soul Silver you can but in gold you catch Kyogre
In a swarm on route nine