Where was N before B2/W2?

Question

After finding all the sages in Black/White, Looker says that N was spotted somewhere far away with a Legendary Pokemon(Reshiram/Zekrom). So what was that far away place?

Answer 1

He maybe was dwelling in his castle in Victory Road.

Comments

He said it Far Far Far Far Far Away.

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Well, the very bottom floor of N's Castle since there is no evidence of N going to any other region. N's Castle really seems like the only viable answer to that.

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I'll think about it.

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Actually he appears at the Ferris wheel in B/W 2

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You were talking about B/W, not B/W 2.