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
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.
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