Assuming you mean Adamant, Lustrous and Grisious Orbs, they are given to you because there is no way to import them from the 4th Gen games. They are Dialga, Palkia and Giratina's hold items (though any Pokemon can use them) and it's just their way of having them in the 5th gen games, for anyone who wants to transfer those legendaries.
you don't have to to anything with the orbs. They only give you the orbs so if you transfer those legendary Pokemon to Pokemon black or white you can give those legendary Pokemon the orbs.
Pokemon Black only takes place in the Unova Region.
So you can give them to Dialga, Palkia, and Giratina
You don't need them for the storyline, you get them so your pokemon can hold them and raise their stats.
you cant the orbs are exclusive to certain games
you cant because they gave you the orbs so if you got the pokemon on diamond or pearl you would transfer it to this game and then you give them the orb
Because you can't trade items from the GenIV games, they needed other ways to get certain items into GenV. Since you can migrate Dialga, Palkia and Giratina across, it's only fair that they can still somehow get their orbs in Black and White.
The Red and Blue Orbs are found at Mt.Pyre ...both the team magma and aqua bosses will have gathered there and you are able to take both the orbs..:)
somwhere in a cave there are orbs in a pokeball get that orbs en go to spear pillar
Get Petrify Orbs and Spurn Orbs!!!
It is the graveyard of Pokemon and where the red and blue orbs are resting.
you cant