Cheating a team and then using it to battle with others is cheating to win. Just because you don't cheat it doesn't mean you're not a serious battler. I have several level 100 Pokemon with good stats and moves that I have given to them through TM's, eggs, Move Tutors, and other things that took hard work and for you to simply get on to Wi-Fi and battle with all your cheated Pokemon is just wrong. I will say agin that I strongly hope that cheaters are banned from Wi-Fi and that you will only battle online if you do it the right way.
Please don't take this as me flaming you, but if you want to battle people and try to win, it is only fair no to cheat.
And for others who don't know that he cheated, he started a thread somewhere else about how he did so.