he will be saved on your pokedex as seen but you will never get to capture or battle him in the wild again
and that is for all legendary Pokemon
A event which you can get palkia, dialga or giritina
you get giritina in the distortion world. It really is quite simple
you could get a giritina from a trade or action replay
U catch it in a master ball and then u just carry on the game
It depends what game you have. In diamond/pearl you can't. In platinum, if you make it faint (not kill, Pokemon can't die) you cab't catch it, BUT you can catch again its its ALTERED FORM (which looks cooler).
If you want to defeat GIRITINA just do it but use a quickball to do it that thing is ghost type so be carful
ghost/dragon
spring path.....
Giratina
You can't.
no
if you dont catch giritina but you kill him, you dont have another chance enless you saved the game right before you tryed to catch him