Ben 10

I am confused. I just saw the "Kevin 11" episode of Ben 10, from the first season.

How did that kid, that supremely evil kid become one of the main heroes of Alien Force? And how come he absorbs matter when he's 16 when he absorbed energy when he was 11? The energy was cooler... although it was more conducive to crime and the matter-absorbing might be more useful to good-doing. I dunno. But seriously. He went from seriously evil and bent on revenge to helping Ben & Gwen? Although he was still bent on revenge at the beginning of Alien Force...
huh. Maybe he's not so different. I still wanna know what happened to his energy-absorbing though.

Now I just need to catch up on the first half of Alien Force season 1. And last week's Heroes. >__<