You cannot catch Garitina on Pokemon Black. However, you can trade for one or transfer one from a DS Series game.
garintina
poke transfer only, using black and any game with garitina in it that takes place in the sinnoh region.
To catch garintina
Trade it with ur friend.simple.
you just have to keep going and the legendary is garintina
You can't catch him, but you can transfer him with a friends ds to yours.
After you beat/catch garintina in diamond you could keep training or just keep fighting the pokemon league. Also, you could go catch more legandary pokemons.
Nothing happens they get trained- both of them no giratina egg - no gender for the other Pokemon = no egg
You have to beat the guy who wants to to use Pokemon for no good.... then you can get the Pokemon..... if you beat it then you'll have to wait until you beat the champion.
you can get a entei,rakiou and i think suicune =) that is a load of rubbish it is the lake Pokemon and garintina the only way to get the dogs are action reaplay
fist of all if you didn't save the game be for you fight garintina then you can't catch him.but if you did save it turn off your game and turn it back on and you will be there next to garintina. hope i help.
if your talkin about garintina then go to spear piller after team galactic goes ta mt cornet and youl battle some guys and then youl go to the distortan word and youl do some cool things and battle cyrus and youl face garintina