In Pokémon SoulSilver the only way to get Arceus is to trade the Arceus from the event that happened in 2009 over into SoulSilver or HeartGold, the event is no longer active so if you didn't get one then you would have to wait for the next Arceus event or you could use a cheating device in order to cheat for it. Or just trade it from Diamond and Pearl.
You get it from a trade.
You can only get Arceus from Pokemon D/P/Pt.
Through cheats
i am sorry but you cannot obtain arceus in Pokemon heartgold or soulsilver.
Yes you can get Arceus if you have a Pokemon platinum,diamond,or pearl and you have giratina dialga and palkia trade them to your Soulsilver and then a mountain will appear somewhere and then Arceus will be in there
You cannot catch Arceus in Pokemon Soulsilver nor Heartgold, You must either transfer a Arceus from D/P/Ptt or Receive one through the Arceus Event.
Only with hacks
Nope arceus is one of those unobtainable Pokemon along with Shaymin, Darkari,Manaphy
You can't get arceus in Pokemon soulsilver unless you trade from another Pokemon game.
To get an Arceus in Soulsilver or Heartgold, you needed to download it at an event, otherwise you would have to use codes or trade from another game.
It must be the "12 Movie Event Arceus"
get an arceus and take it to ruins alph
Arceus