"its success appears to be due to the combination of varied and exciting characters (all those neat combinations of animals and powers!), a sense of collectibility (Catch em all!), and a variety of ways to enjoy it (the cards, the videogames, the dolls, the cartoon, etc.)."
I'm just glad that we're getting more anime (Japanese animation for those who don't know) on this side of the pond. Pokemon has gone a bit too far though. I'd take Tenchi, or Vampire Hunter D, or Evangelon any day.