After you catch ARCEUS, if its in your party and if you have any of the plates obtained in the game you can let ARCEUS hold a plate, then look at it, it will be different color and a different type. If your ARCEUS is Lv.100, it will know Judgement. If ARCEUS holds a Plate, Judgement will be that Plates type
Also, there's a Easter egg (well kinda) in the game. If you go to Celestic Town(the town where Cynthia's mother lives)and you go into the cave(make sure you have ARCEUS in your party)and click on the three beings, then Cynthia will arrive and tell you story about how Sinnoh was created and blah blah blah.
If you got the TRU ARCEUS, you can talk to a hiker in the Oreburgh Gate. The hiker will give you a Flame Plate. Remember, it has to be the Flame Plate!
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You can catch Arceus in Diamond, Pearl, or Platinum.
THERE IS NO CODE!!!!!!!!!!!!!!!!!!!!! Go to ToyRus to get the place to catch arceus
No
you gotta get all regis for regigigas and the event for arceus is over.
The only way to catch Arceus in Pokemon Platinum is by using the Azure Flute or cheating. The Azure Flute is an event item that sadly was never distributed. This means the only way to catch Arceus is by cheating.