Well you have to train it to at least lvl70 oh and go into prof rowans lab
you cant you can catch it platinum then trade it to diamond
in the distortion dimension and if that fales turn back cave
lolololol in Pokemon black you cant find girintina!
Go to the Ruins of Alph
same place,but you need the two orbs,adamant and the one next to it!
I don't know excatly but what i do know is that my cousin said that you have to have Palkia,Girintina or DIALGA to catch HEATRAN.
You have to get to a certain point in the game and go through spring path (near soleceon town) and go through turn back cave then you will find him
most legendaries such as girintina, heatran, dialga, or arceus. my party is: dialga, palkia, heatran, girintina, and lugia. but i think the best Pokemon is a lvl. 100 ditto.
youll fight girintina level 100
giratina is #210 in the Sinnoh Pokédex.
when in spear pillar(the heart of mt cornet) you go through a little scene and you are dragged in the Distortion World, Giratina's dimension. you go through obstacles and you battle/ catch Giratina. i would highly recomend dusk, premier, ultra, great or timer-balls to catch Giratina if you want to save your masterball
what pokemon is on the boxart.If u have him,ur lucky(its girintina)