5 legionaries
In Pokemon Black you can actually get quite a bit of legendaries. You can Get Reshiram, Kyuram, Giratina, and Arceus. Also Kyogre and Groudon.
There are 130 in black and white. 26 more are legendaries. This adds up to 156 pokemon.
in Lala land
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I put a link to guide on all the legendary pokemon in Pokemon Black in the related links.
51
The legendaries on Pokemon black are Tornadus, Kyreum, Reshiram, Cobalion, Terrakion, and Virizion. I can help you find them, too!
All except for Garitinia and all from Pokemon black and white.
They are similar but they have different legendaries. *Source- Played Pokemon when I was little.
There there are 36 legendaries all through out the Pokemon regions but there are Arcanine,Gyarados,Milotic,Rotom,Unown,Dragonite,Tyranitar,Selemence,Metagross,Garchomp, Ninetails,Lucario,Togepi,Absol and Spiritomb which i consider legendaries so that makes it 51 if you believe they are legendaries and they will also make more legendaries in the future of Pokemon hope i helped also i have all the legendaries and wouldn't mind trading them to Pokemon trainers or collectors. Contact me at trippyranga@hotmail.com
No. Pokemon Black and White are the only current games with no legendaries not belonging to their region. It can be traded from other games, though.
Ditto can breed with anything except legendaries.