I've mentioned this somewhere on GameFAQS before, but as of BW2, we've had both a male and female representative (either Gym Leader or E4) for every type except for Bug (and Fairy, of course). Even though Viola was revealed a couple days ago, this little tidbit is just now coming back to me, so I guess this changes things: we now have at least one male and female representative of every previously-existing type. Now to just see how long it takes for Fairy to reach that point (amusingly enough, the newer Dark and Steel each got a male and female representative as early as generation 3, with Karen/Jasmine and Sidney/Steven).
BTW, in case anyone's interested, these were some other statistics I've noted.
Types without a Gym: Dark Types without an E4/Champion: Normal, Grass, Electric, Flying, Rock Types without an early Gym (first four): Ground, Psychic, Ice, Dragon, Steel, Dark Types without a very early Gym (first two): the above+Electric, Ghost, Fire (if you discount Chili) Types without a late Gym (last four): Grass, Rock, Bug, Dark Types without a very late Gym (last two): the above+Normal, Fighting, Flying, Poison, Ghost, Steel
it would be really great to have a late-game bug gym
i still think we should have dragon as the first gym. gives all the starters disadvantages and puts them on equal ground (something that none of the games have done so far besides BW1&2, though you could argue RSE and DPPt because Fire/Fighting)
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