NO.
You need to migrate it from Ruby/Sapphire/Emerald or have someone trade to you the event Regigigas that will unlock the other Regis.
Yes i think it does, the game has the event programmed into the game even if you dont trigger it with a regigigas. You could even trade a regigigas from D/P to trigger the event.
You had to get it in a Nintendo event for D&P, then trade it over.
Yes Everyone Will Becz regigigas is stronger than arceus. arceus Is not to powerfull u know anyways With regigigas u can get the other ones =P
Trade the event Regigigas to Pokemon Platinum then get the national pokedex and it will unlock certain events in the game.
In a wifi event you are given a Regigigas and it unlocks them. That it the only way unless you trade
the arceus event
only if you have a level 100 regigigas and a level 100 shaymin
Pokemon movie nr. 11, you can only get the lvl. 100 regigigas as a gift while you watched the movie, in Japan. Such an event was once, not anymore. but if you want, you can get the lvl. 100 regigigas from a friend, if someone has it :-)
You can't get regigigas in Pokemon Heartgold. only if you trade.
Yes, but only with a certain Regigigas that was given away in an event; this event has passed long ago. Otherwise, you have to trade or import from a previous game.
I will trade you a ho-oh but only of u trade me a areus,darkrai,or regigigas.