I agree with 560. The idea of using Red's team is good, but the idea behind challenges is make the games fun when just playing them isn't enough.
Also, what does playing with Red's team have do with filling up the Pokedex? That makes no sense, and if I wanted to do that, I would do the Pokedex challenge.
I think it's a lot more user friendly and interesting to read about other people doing a challenges when they do stuff different from you. No one really wants to read about the same team with the same movset over and over again.
Just a thought. Good idea, not so good execution.