It's odd we are seeing Serena working on her performance, when we have yet to see the full thing and what it really consist of. I expected the concept to be stretched a bit more here, but instead we got unecessary TR/Chespin's antics that lead nowhere, they even could've used this to give some Serena/Clemont "interactions", but they consisted pretty much on them just standing together. Still, Nene and her pokemon were nice characters, I find it surprising she wanted to trade her pokemon without hesitation. Poor Farfetch'd. And the performances were actually good, eager to see Serena's full on-stage performance.
Wondering how they'll handle the overall competition though, will participants just show off their performances and then the judges simply decide who did the best? Maybe they do plan to add in some mechanics like working with different types of attacks and themes or something. Or rather than the actual activity, episodes will focus around the drama behind the scenes of the idol world? idk, I'll wait until we get to see the full event before passing judgment, but it's kind of hard to imagine how they'll keep this being interesting after a while. They should've had Serena become a full coordinator imo. At least the Skiddo's ep implies she's getting focus outside performances in the future too.