Go to the Spear pillar, and it will activate.
Because it only works once ina game of pearl platnium and diamond to catch arceus
You Would Need an Action Replay . Once You get an Action Replay Get The Code For Azure Flute . This is How you Become able to get The Chance to Encounter Arcues in The Game . Once You use The Flute Go To Mt. Coronet . In Mt. Coronet You will Need To Go to The Same place Where you Encountered Dialga. It Will Look a Little different From When you Last Saw it. Go To The top of The Steps & there will Be a Lv. 80 Arcues waiting for You. P.S. Save the game before battling Arcues so if you Lose You may try again . Good Luck & Have Fun With Your New Arcues
you need to use an action replay or go to a Pokemon event to get azure flute. once you have the azure flute you go to the top of mount corenet and play the flute. arceus will appear at level 80 so be prepared
once you get the flute from mystery gift (i think its called azure flute) you go to the shrine in ilex forest and itll take you back in time to catch it.
You will need the event item Azure Flute. The Azure Flute opens the way to the Hall of Origin where Arceus is once you get to Spear Pillar.
To Catch Aceus you need to use a action reply cheat that gives you a azure flute or you can buy it as a Nintendo event if you use the code for action reply go to the pokemart and talk to the green guy and he will give you the azure flute either way once you have it go to the spear pillar which is in mt coronet and it will say do you want play the azure flute selec yes and a staircase will open and there is aceus at level 80.
You need the *azure flute. once you have this you can find arceus by playing the azure flute, to access the hall of origin. Once you have the Azure flute, you should proceed to the spear pillar, at the peak of mount coronet, which is annoyingly difficult to get to. Once you are at the spear pillar, the game will automatically ask if you want to play the azure flute. Obviously you do. When you say yes, some stairs will appear, leading you to a level 80 arceus, the second highest leveled wild non-glitch pokémon in the games. when Arceus is captured or defeated you won't be able to access the hall of origin by using the azure flute anymore, so i recommend you save before you enter it, in case you mess up :D *to get the azure flute you can use the cheating device, action replay, mystery gift, or any future Nintendo special events.
once you get the azure's flute go to the spear pillar then if you see the flute symbol stand on it then blow it then a staircase appears then you step up then you enter the hall of origin then if you enter it you will encounter the most powerful Pokemon in the game the Pokemon is called arceus then if you saved the master ball you will catch it easily.
You can get the Azure flute once in awhile when Nintendo hosts an event or by an action replay.
If you used it once, then it should work. If you hacked or cheat to get another Azure Flute and went back to Mt. Coronet to where Dialga and Palkia were, you cannot be able to do it again. Make sure it was your first try using the Azure Flute and you are where the Hall of Origin is.
First, you must obtain the Azure flute. (Only obtainable though and event or gameshark) Once you obtain the Azure flute, go to the Hall of Origin on Mountain Coronet (Where you catch Dialga and Palkia). When you enter the Hall of Origin, it will ask you if you want to play the Azure flute. Say yes and it will play a little tune. After that, a staircase will appear; walk up it until you see a platform. Save right when you get in front of it!Here is the Action Replay code for the Azure flute:94000130 FCFF0000 B21C4D28 00000000 B0000004 00000000 0000AA3C EDB88320 2000AA68 0000000A D2000000 00000000 Press L + R and walk into a Pokemon Mart after entering the code above. You will see a guy in a green suit that will gie you the Azure flute.
It was out once but I'm not sure if it will be ever again and if it is it will be a special occasion