Board Thread:Questions and Answers/@comment-5691231-20121205023024/@comment-4149352-20121205023938

I'm guessing that when the Wattersons ran him over all the trash cans he was knocked into soiled his clothing. Or maybe the impact of the car got the magic knocked out of him, since all it took to regain his powers was for a present to land on his head. I dunno, just headcanons here.