I measured it. I put a Lucky Egg on a `mon and played Triple Battle with the `mon in my party. I received 52,954 Exp in 9 minutes with O-Power lvl 3.
I did the same at the Battle Chateau, came across Champion Diantha and Duchess Rosile and Leader Clemont before my Lvl3 O-Power disappeared. In a mere 4 minutes, I gained 66598 experience. Without O-Power lvl3 (for the next 5 minutes) I continued to focus on the high Exp foes, and got another 13,000 exp for a total of 80,101 in the same 9 minutes that I'd spend at Le Wow. (Marchioness Yolande, Countess Elaine, Earl Nassak)
Also managed to get Leftovers and a PP-Up from my Pickup pokemon at the Battle Chateau, since you can check after every battle.
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+Money is also useful if you're collecting all of the stylish clothing in this game. I'll write down the experience gain at Le Wow rotation battles next...
I did the same at the Battle Chateau, came across Champion Diantha and Duchess Rosile and Leader Clemont before my Lvl3 O-Power disappeared. In a mere 4 minutes, I gained 66598 experience. Without O-Power lvl3 (for the next 5 minutes) I continued to focus on the high Exp foes, and got another 13,000 exp for a total of 80,101 in the same 9 minutes that I'd spend at Le Wow. (Marchioness Yolande, Countess Elaine, Earl Nassak)
Also managed to get Leftovers and a PP-Up from my Pickup pokemon at the Battle Chateau, since you can check after every battle.
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+Money is also useful if you're collecting all of the stylish clothing in this game. I'll write down the experience gain at Le Wow rotation battles next...