Having finally mastered Synchro with Greninja, it's time for Ash to have a rematch with Wulfric and earn his final Kalos Badge. Changing things up, Ash manages to get through until Wulfric shows a strategy he didn't see last time, with his Abomasnow Mega Evolving into Mega Abomasnow. With Abomasnow getting even more powerful, Ash faces an even bigger challenge than before. Will he and Greninja manage to push through and win his final badge?

Clemont invites the rest of our heroes to experience one of his true passions, while a certain group of uninvited guests are along for the ride.