In all honesty, I`m surprised this hasn`t already been posted, (though I`m still getting the feeling I just ended up overlooking it in PokeNews...in which case I`m very sorry about double posting xD) but anyway, Pokemon Sunday showed a fairly long demo of Pokemon Black and White in which the female trainer battles Bell, and then shortly after, Cheren. It was shown that, (unless it varies between play-throughs) Cheren will hae the starter which is advantageous against the player`s Pokemon, while Bell will have the starter which is at a disadvantage. Additionally, the female trainer`s VS sprite and in-battle player sprite and animation was also shown.
Aside from that, a small segment showed two new characters who will be appearing in the Best Wishes anime, Iris (アイリス) and Dento (デント). Iris is travelling with a Kibago. Additionally, the official Best Wishes website had mini-bios for both characters:
Iris: "Iris is wild-acting girl who likes to climb trees and chew berries. For some reason, she's travelling with her friend, the dragon type Pokémon Kibago."
Dento: "With an abundance of knowledge and experience, Dento is a "Pokémon Sommelier", who checks ("diagnoses") the compatibility between a trainer and their Pokémon, gives them advice on how to become better friends. Is the actual condition what is expected?"
Here is the promotional poster for the series, provided as was one for the Diamond and Pearl series before it begun:
Both videos can be found below: