The Battle Chateau rewards consistency: the more you battle there, the more your title grows, and the more prestigious your opponents become. At the top, Diantha herself awaits you. Here is how to become Grand Duke without spending weeks at it.
Three levers raise your title: the number of victories at the chateau, your progress in the adventure, and having beaten the League. The last titles are only available after the credits.
The upside: these are normal battles, which bring in money and experience. The chateau is therefore also one of the best training grounds in Kalos.
