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Platinum: Alternate Forms
Giratina:
Altered Form
Origin Form
Giratina is always seen in its altered form in Diamond and Pearl. Giratina can be seen in its origin form in Platinum when it is equipped with the Platinum Orb or when the player is in the Distortion World.

Rotom:
Sprite
Form
Special Move
Original
None
Fan
Air Slash
Frost
Blizzard
Heat
Overheat
Mow
Leaf Storm
Wash
Hydro Pump
In order to change Rotom's form you must get a key from an official Nintendo event. Once you have the key you must go to Galactic HQ and use the key to enter a locked room. Inside the room is a fan, a fridge, a heater, a mower, and a washer that can transform Rotom. Each different form Rotom takes gives him a new move.

Shaymin:
Original Form
Sky Form
In order to change Shaymin's form you need a Gracidea Flower Key that can only be obtained at an official Nintendo event. The key must be used during the day and Shaymin can't be frozen.