You can't. Origin Forme and the Grisious Orb don't exist in D/P, so you can only get Altered Forme.
Giratina's origin forme is not present in Pokemon Diamond only it's Altered forme. Whilst you can still attach the Griseous Orb to it, it will only boost Giratina's stats ,not change it's form, to do that you need to play Pokemon Platinium.
if you know what it looks like in altered form it basikly looks like a worm but has the colors of the altered form.
Groudon (2094.4 lbs)Giratina (Altered) (1653.5 lbs)Dialga (1505.8 lbs) Giratina (Origin) (1433.0 lbs)Metagross (1212.5 lbs)Snorlax (1041.1 lbs) These stats takes form Bulbgardens.com
The origin form is stronger due to the griseous orb.
Giratina Altered Forme is a character form from the popular Pokemon game series. It is actually Giratina's altered form.
In diamond and pearl giratina turn in the altered form, only in platinum it show its origin form
there are two forms, origin forme, and altered forme.
In his altered form his height is 14'09" and his origin form his height is 22'08
You can't. Origin Forme and the Grisious Orb don't exist in D/P, so you can only get Altered Forme.
Giratina's origin forme is not present in Pokemon Diamond only it's Altered forme. Whilst you can still attach the Griseous Orb to it, it will only boost Giratina's stats ,not change it's form, to do that you need to play Pokemon Platinium.
No, Giratina's Origin Forme is unavailable in Diamond, Pearl and Battle Revolution. Trading it to Diamond and Pearl and/or copying it to Battle Revolution, it'll revert back to its Altered Forme.
if you know what it looks like in altered form it basikly looks like a worm but has the colors of the altered form.
In a way, yes. Your opponent will only see it as an Altered Forme Giratina, no matter what game there playing. As for trading, no. The Griseous orb will return to you automatically.
Yes, Giratina can be caught in the post-game if you didn't already catch it. You'll find it in Turnback Cave, although it will be in its Altered Forme rather than the Origin Forme you find it in at the Distortion World.
To change Giratina to its Origin form, you need to equip it with the Griseous Orb item. This item triggers the transformation into Origin form during battles. Giratina will revert to its Altered form if the Griseous Orb is removed outside of battle.
Groudon (2094.4 lbs)Giratina (Altered) (1653.5 lbs)Dialga (1505.8 lbs) Giratina (Origin) (1433.0 lbs)Metagross (1212.5 lbs)Snorlax (1041.1 lbs) These stats takes form Bulbgardens.com