Hello,
I hope I won't get an infraction for this bump, but I have done some re-search, probably some things I'm going to write are known.
I have made a Excel Spread Sheet (You can find it here) including the info about the Arceus in a Hex Editor, I have added the following values: 00 (Offset 0000040), 06, 0A, because those values are different for every Arceus with a different Plate. I tested for every Plate.
The 00 is the Sprite,
The 06, 0A are for the Hold Item.
I'm currently looking for a match...and I'm trying to use some random numbers to see if I get the Item we all want!
I hope this information can help us all :biggrin:
Regards!
EDIT: I have sorted the Spread Sheet and there is definitly a match for the Item (The Plates) I will update the Online Spread Sheet.
EDIT2: Again an Edit; this time I found another match, I updated the Spread Sheet so check it out!!!