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If genetics do end up the theme of gen VI, canon genderbending means would be pretty awesome. Never having to spend hours anymore looking for the 12.5% of females, no more disappointment about male Hidden Ability pokémon... It would make breeding a lot easier if you could just change your pokémons sex whenever you needed.
I know about pokésav and other pokémon modifying programs. I'm just saying it'd be nice to have an official alternative.