Answer 1

You can get arceus in pokemon black in 3 ways:
1. Poketransfer from ss hg, platinum, etc.
2. Hack with a action replay(not encourgeing)
3.Type in the password ARCEUSVOTE in global link to recive a movie edtion of Arceus.

Hope this helped

Answer 2

Use Poketransfer or the you could get it by a dreamworld event that passed some time ago.
So ,Actually, No you cannot unless you use Poketransfer.

Comments

What is poketransfer? Just out of curiosity

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Its a feature that let's you pass Pokemon from D/P/Pt and HG/SS To White/Black. You need two DS Systems.And also you have to win the game.

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thx so much <:)

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where is global link?