you need a action replay cheat code and the action replay.
Go to youtube and write "Pokemon Diamond and Pearl-HOW TO CATCH DARKRAI-WITHOUT ACTION REPLAY-TWEAKING GLITCH". It works! See for yourself.
It is a shaymin that came from an event and is legit. Not hacked. A lot are.
You need to have an event Shaymin in order to get a Gracidea flower from the lady with the blond hair in Floaroma Town. The event Shaymin can be any event Shaymin as long as it's legit however it must be an actual event as in a Shaymin that was downloaded directly into your game like the Japanese movie event Shaymin or the Toys 'R" Us event Shaymin.
event
you have to go to a Nintendo event and then you will get the Shaymin.
get it by event
yes
In DP, go to the flower shop. The shaymin MUST be an event shaymin. :3
no , you find it at flower paridice after you get oaks letter
no
Sorry, you can't. D:
because it is not an event shaymin