It is impossible to catch a Zekrom in Pokemon Black without messing up the game's code. The only possible way so far is to trade with someone who has a Zekrom.
you catch him in the ruins, in the desert, after you have beaten N zecrom.
its a bit stange, but in white u catch zecrom and in black its reshiram
You cant actually get zecrom on black. you have to get white
you have to have Pokemon white but if you have black you need to trade from someone with white. you need to have completed the Pokemon league then you catch zecrom then you battle N who has Reshiram then when you defeat him you have to battle ghetsis.
You trade it from white to black.
No. Zecrom is unavailable in Pokemon Black. You will need Pokemon White to get it.
i do not know the difference but i heard you can catch the kyurem forms of rusharam and zecrom so yes it is worth it
Legendary Pokemon cannot be breed.
no you can only get Zecrom in Pokemon white you get Reshiram in Pokemon black in N's castle.
there is no "white" legendary in pokemon white. its black ( and called zecrom) and in the top floor of N's castle and then after u VS N
acually there is but not Reshiram or Zecrom but you can get cobalion terrakion and virizion
to catch zapdos in pokemon black you have to have every legendary pokemon