Sorry, I couldn't resist! Luvdisc shouldn't evolve, though. Now that we know it doesn't evolve to Mamanbou, Luvdisc is suddenly cool BECAUSE it doesn't evolve. I don't know why, but it is.
I like Psystrike's idea of fighting the other team after the elite 4. Mostly because I can't wait for an actually threatening Archie/Maxie with level 65-70 pokemon! Then throw in gym leader rematches and the elite 4's round two teams, and you end up with very high leveled pokemon by the time you're done!