no
Normally it would be Giratina, but with the special event its Arceus hands down
In a Pokemon Special Event, you can get any legendary pokemon. (Legendary Pokemon include: Azelf, Mesprit, Uxie, Darkrai, Shaymin, Palkia, Dialga, Giratina, Celebi, Lugia, Ho-oh, Mew, Mewtwo, Kyoger, Groudon, Entei, Swicune, Raiku, Rayquaza, Deoxys, etc.)
The ones you can get in the storyline are Dialga, Mesprit, Uxie and Azelf, Crescellia and Giratina. The rest have to be traded, cheated or obtained over special events.
you cant but you can in explorers of the sky by getting giratina's special orb
There is only one way to get Giratina... and that is to have the event Arceus. I heard that if you were lucky enough to get the event Arceus you go on some special mission with it in Soul Silver. In the mission with Arceus on some part you get to choose one of the three legendary Pokemon: Dialga, Palkia, and Giratina. That's the only way to get Giratina in Soul Silver. Either that or trade.
it is a move that only some legendary pokemon have
They are Giratina, Dialga, Palkia, Darkrai, Arceus, Cresselia, Uxie, Azelf, Mesprit, Heatran, Moltres, Articuno, Zapdos, Shaymin, Regigigas, Regice, Regirock, Registeel and Manaphy (Recieve egg from Pokemon Ranger). Some of them require special events.
yes but giratina, shaymin and rottom special forms will not appear
You'll have to have received it from a special event.
One advantage with Giratina's Origin Forme is it has better Attack and Special Attack but it has less defensive-related stats.
The Pokemon that can be caught without special events, trading, or cheating in Pokemon diamond are: Uxie Mesprit Azelf Dialga Giratina Heatran
Deoxys-A has the highest base special attack of all pokemon, with 180. Among non-legendary pokemon, Chandelure has the highest, with 145.