hall of origin
You use the Azure Flute to catch Arceus at the top of Mt. Coronet at the Hall of Origin.
sadly, there isn't one. Only in diamond and pearl.
Arceus does not appear in heartgold or soulsilver so you got to know the only way is to trade it from Pokemon diamond pearl and platinum and you need to get an azure flute and go on top of mt coronet and go into the hall of origin where arceus is waiting for you.
You can get to the hall of Origin by playing the Azure Flute on the top of Mt. Coronet.
If you mean hall of origin, it's not in any gba game. It's only in platinum, pearl, and diamond.
It's at the hall of origin to get there go to spear pillar and use the azure flute afterward stairs will appear go up to reach the hall of origin and arceus will be right there.
in the hall of origin
Arceus can be encountered in the Hall of Origin in Pokemon Diamond, Pearl, and Platinum. The Hall of Origin is an event-only area that is located above the Spear Pillar. It is accessible only after the player has obtained the Azure Flute and entered the Hall of Fame.
Its diagla,Go to sky pillar,but a easier way is to go to hall of origin and skip Cyrus battle. by-justin aka Dagr81
The Hall Of Origin
You can find her at the Contest Hall.