Lol I just finished the episode. Serena was so annoyed by Nikola and Tesla. xD
Pikachu battling was unnecessary imo but I am at least glad Froakie and Fletchling were out too. I liked the whole Battle Chateau concept and I wouldn't mind seeing it again in the future. I also noticed that she called Dusknoir cute hehe. Wow, I love that girl. Overall, a really nice episode. This would have benefited from being a two-parter which would have not only allowed the battles to be more fleshed out but also allow Froakie or Fletchling to battle too.
And Grant was nice too imo he wasn't boring and I love his climbing obsession. :P
By the way guys there was no romance in this episode whatsoever.