You can't.
You can only get arceus without cheats if you go to an event.
You can't catch Arceus without cheats.. You can get it when an event is going on about Arceus..
Without cheats, you can only obtain Arceus through a Pokemon Event.
You can't get him without events or cheats. For Darkrai, Manaphy and Arceus you need a event to capture him.
the only way you can get arceus without cheating is by getting a mystery gift, you get them via wireless internet, look up when the arceus event is coming
you had to get the azure flute during the arceus event. it passed so you have to use codes to get it now. hope this helped ;D
get through a gamestop event or by cheats
Trade.
there was an event at toys-r-us but its over so no you cant catch him anymore without cheats or action replay
Then it is impossible. You will need a Wi-Fi event to do this.
You cant.You need the azure flute for it.You can get an azure flute from a Nintendo Event or you use ...uh,arghh.... cheats.....
it isn't possible without cheating