To me it was heart breaking (in a emotional way) defeating Korrina, well mainly her Mienfoo - I always feel so sad and guilty every time I have to defeat one of my top 3 favorite Pokemon.
Hearing all that news about E4 - I'm going to train for the E4 then, since I know that my team may be a bit weaken.By the time I reach E4:
1 Grass/Ground (Chestnaught),
1 Normal (Linoone),
1 fighting (Mienfoo),
1 Water (Floatzel)
1 Psychic (Meowstic)
1 Fire/Normal (Pyroar)