THE ARCIUSE CODE FOR POKEMON PEARL IS YOU GO TO JUBTUFI CITY TV ON THE THERD FLOOR GO DOWN TALK TO THE MAN PRINT EVERYONE HAPPY THEN PRINT WI FI CONNECTION HE WILL GIVE YOU THE MYSTORY GIFT IF YOU HAVE POKEMON BATTLE REVOLOUTION BUY A GIFT AND YOU GET TO DOWNLOAD AS MANY MYSTORY GIFTS UNDER 2 00 MINUNETS THAN GO TO THE TITLE SCREEN ON PEARL OR DIOMAND CLIK THE MYSTORY GIFT CLIK GET FROM VIA WIERLESS THEN YOUL EVENCOULY GET YOUR GIFT OFF OF BATTLE REVOLOUTION ON PEARL OR DIOMAND GO TO A POKEMART THERS A GUY IN A GREEN SUIT TALK TO HIM HE WILL GIVE YOU YOUR GIFT AND THATS ALL I KNOW
yes you can but only through a Nintendo event or Action Replay I dont know when the Nintendo event is but i know that you need a Azure Flute to get Arceus after you get the Azure Flute go to any pokemart and before entering hold L+R then you will see a green guy talk to him and he'll give you the Azure Flute then go to Spear Pillar (where Palkia was) and it'll say that the Azure Flute is ringing then go up the stairs it shows then you fight Arceus.