Best Champion ever? Well, she's on par with Shirona to me.
Brilliant choice of Champion though.
I like her team, especially my Gen 5 favourite Archeops ( besides Zuruzukin, of course ).
Wallace seems younger than his "master" Juan and became Champion instead of him, so it isn't as far fatched that Iris just had more potential than Drayden. Iris being too young is also a moot point since Blue was probably even younger than Iris and Red's badassery *cough* is for some reason universally accepted while he is pretty young as well.
Anime, Games, it doesn't matter, I guess people like to call her a Mary Sue everywhere. :p