No. The only other way is to get it from a friend or using the GTS (Global Trading System)
There isn't a date for the Arceus Event in Pokemon HeartGold (unless you mean the event where you get Arceus). When you send over any Arceus into your HeartGold game, the event is activated. You'll have to go to the Ruins of Alph in order to do the event.
yes you can get arceus on any sinnoh game
Yes, but you have to get it from a Nintendo event (If they have any new events for Arceus) or trade with someone who got it from an older event.
any time
Any time you have arceus in your HG/SS party and go to the ruins then the event will happen!
No, the movie Arceus that has been distributed in Japan is not the only Arceus that will work for the Heart Gold and Soul Silver Arceus event. That Arceus was special, because of the fact it unlocked a special Pichu event in Heart Gold and Soul Silver. Any Arceus will work for the event in which you can get a Level 1 Dialga, Palkia, or Giratina in Pokemon Heart Gold and Soul Silver.
no you can use any as long it is a special event one
no it can have any moves
internet mystery gift.
you cant catch it on SoulSilver or any other Pokemon game because you can only obtain him via Nintendo wifi event
There are some people who do have Arceus from the recent event from the release of the Pokemon movie involving Arceus, and there are others who do not.Many people have heard of the recent event from the release of the Pokemon movie involving Arceus at participating Toys 'R' Us's, and many people do have an Arceus.However, the likeliness of any Pokemon trainer giving up their one and only Arceus for trade is highly unlikely. The only Pokemon trainers who are willing to give up their Arceus is those who didn't get theirs from the event and used an Action Replay to get as many as they want.
it depends on what event you are looking for.YOU CAN GO TO A NINTENDO EVENT FOR ANY EVENT darkrai,shaymin and arceus can be gotten via Nintendo event