Go to Veilstone City and interact with 1 of the meteorites there, that'll change Deoxys' form into Attack, Defense, Speed or Normal Forme.
You cannot change his from in Pearl only Platinum.
no not at all
you can't
Veilstone City.
You can't change Giratina's form in Pokemon Pearl (that includes Diamond). You can change Giratina's form in Pokemon Platinum (that includes Heart Gold and Soul Silver). You can change Giratina's form with the Griseous Orb. To change Giratina's form give Griseous Orb to Giratina and then take it off and Giratina changed its form.
No, it never evolves, but you can change it's form on Pokemon diamond/pearl.
You can't get origan form in Pokemon pearl. Sorry...
They are at the east of veilstone city, there are 4 meteorites, each one make deoxys change of form, (speed form), (atack form), (defense form), (normal form).
You can't change Shaymin into Sky Form in Pokemon Diamond (that includes pearl). You can only change Shaymin into Sky Form in Pokemon Platinum (that includes Heart Gold and Soul Silver). You can get the Gracidea to change Shaymin into Sky Form.
You change his form in pokemon diamond pearl and platnium, you need a special key though for something in eterna city
In Veilstone City. The south-east of Veilstone city.
They power up certain moves and change Arceus's type/form!