Bloody hilarious episode. It was so obviously a gag-focused episode but they'd just put Serena's training there a bit, which I would say they did remarkably well. The writers are hiding her entire routine for her inevitable TriPokalon debut. In the end, this episode was a gag-focused one through-and-through.
From the various Pokemon's reactions and interactions, like Farfetched nearly getting NTR'd via trade, using its leek as a dowsing stick thing, to getting the short end of the stick by barely having any screen time this episode, to the human character's themselves, with TR's actions like Meowth dancing while everyone is talking, Jessie easily getting tired as well as her lewd outfits, and even James' reaction to Chespin and Pancham's infighting. We also have Ash commenting the absurd nature of the fighting and the inevitability of it all (it can't be helped).
Object gags are there as well. We have the classic exploding invention, which was plain funny actually as the Chespin robot tried dancing with Pancham, but also the delayed explosion effect courtesy of Clemont approaching TR's cube smoke cube, and Farfetch'd's stick representing its broken spirit. The sound direction was great, and when I say this, I am referring to near the end of the episode where the music slows down as Chespin and Pancham started fighting again.
I also found if funny that Ash apologized to Nene even after Serena and Clemont already apologized. Heh, guess there's a damn good reason why the group is referred to as Satoshi-tachi. As well as Ash giving Nene pointers and advice regarding her routine.
Definitely one of the more superior episodes as of late in terms of enjoyment.