Before I leave, I'll just leave this here.
The gym leader's Pokemon seem to be significantly weaker than in B/W. For example:
Elesa is the 4th gym leader in both games. In B/W, her lowest level is 25. In B/W2, she is shown to have a level 18 Flaaffy.
Do weaker levels mean some sort of sub-region after completing the Unova League, like in G/S/C?
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ph33r teh masta~!