After you catch garatina,use fly to sangem town(or city) and talk to Professor Rowan I think he will give you something.After that you continue on your adventure.Hope you like it.
You catch Garatina, Dialga,Palkiia,and all the lake Pokemon but mainly Garatina
disortation world
turn back cave(after u beat the eleat 4 )
You can catch "it" in the Distorted World/Torn World, after a series of puzzles. If you dont get it there, you can always get it back at Turnback Cave
if you are talking about platinum maybe.... but on diamond or pearl no. I killed garatina in three hits with my level 85 infernape (it was burned).
The best ball to catch Giratina is the Master Ball but the next best and effective options would be the Dusk Ball or the Ultra Ball.
I am not sure what the code is but, you can catch him in the Distortion World, and in Turnback Cave. You get to this cave after you get the National dex.
Well if you haven't already beat the elite four. Then go catch the second giratina in spring path. Then maybe catch palkia and dialga. (I don't know where they are.)
Try weakening it and use a dusk ball. If not then use ultra balls, or maybe your master ball. hope I helped you
Not sure who garatina is. I know that there is a Giratina in the turnback cave though.
you cant make an egg with Garatina.
it garatina