I preferred Iris as a champion even though she does need a little more maturing. Alder is awesome but his team isn't as good. Iris has a nicer Champion Theme and also a tougher team.
Yes, THAT Lapras and especially THAT troll Level 83 Haxorus with Focus Sash, Outrage and Dragon Dance... And not to forget THAT Archeops with Stone Edge, Acrobatics and Flying Gem in Challenge Mode. It was fun battling with them