i'm in your conscience
No, Swablu forever. XD If I remember right, I think InfernoRogue and I came up with that. Something about Challenges being a nest and me being Altaria and then all the challengers being Swablu. And thus that was born! You can't just make something a mascot, haha.
You should do Favorite Challenge, duh! :) ...When it's got its Gen VI version obviously.