You can't catch it the first time you encounter it, but you can after you obtain Reshiram, later on. That's the trigger for Kyurem to return to its cave. Just do the usual - knock its HP down and either paralyse it or put it to sleep, then hit it with Dusk Balls.
no just one or the other
Surf and stregnth
Maps 25-26
Kyurem is a Dragon and Ice type.
the time and data do NOT matter
no just one or the other
No.
You can't make it transform in Pokemon Black, only Black 2 or White 2.
yes, yes it is
events
level 75
in north of giant chasm
Giratina is stronger.
yes
madarchod
Surf and stregnth
giant chasm