Re: The Event Pokemon
The three event Pokemon I've gotten in Black are Victini, Zorua and Koroark. Victini is a real powerhouse and very useful, especially early on in the game. And I adore Zorua/Zoroark, despite their being fragile. It's such fun tossing Zorua/Zoroark into battle against a psychic Pokemon while Illusion disguises them as one of my fighting types and watching the computer try to use Confusion or Psychic.
Personally, I think Genosect looks like a bug version of Megatron =P