For starteres, I want to give Rica Matsumoto kudos for the way she voiced Ash in this episode, and the animators kudos for the great facial expressions. Ash's emotions came through really well in this episode.
IMHO, Ash's reaction to Rotom leaving to film the detective show was understandable. He was extremely upset at the idea of a good friend leaving him, and the fact that, in his mind, Rotom was more than happy to leave him just for the sake of filming a TV show just made him more upset. Yes, Ash has let Pokémon go before, but there always a sense of regret on the Pokémon's part. Rotom, on the other hand, seemed to be making excuses as to why it was okay for it to leave, and then lashed out at Ash. Ash simply lashed out in return.
Was Ash being a hypocrite? Maybe. But Rotom's arguing with him didn't help the situation. To me, this seemed like two friends lashing out at each other. To be honest, Rotom's enthusiasm at joining the Alolan Detective Laki cast seemed more like a fanatic fan's reaction at the chance to be alongside his favorite TV star, than the reaction of someone for whom this was truly a dream. Rotom was caught up in the moment, without really thinking about the consequences. And in fact, Rotom realized being a TV star
wasn't its dream, which is why it chose to stay with Ash in the end.
What
was a little out of character was Ash holding a grudge, rather than realizing on his own what a jerk he had been. However, that grudge led to Lillie's talk with him, and really, that was the highlight of the episode. It was so nice to see Lillie, whom Ash has encouraged so much throughout the series, encourage Ash for a change, by empathizing with him and sharing her own personal experiences with her workaholic mother.
Screw this episode, because it undoes everything it spent 21 and a half minutes setting up in the last thirty seconds of the show, making Ash and Rotom’s argument pointless because it would've been back in a matter of days since they were only filming one episode
Except the director made the decision not to take filming overseas
after Rotom had decided not to join the cast. Initially, the director said filming would be overseas for
at least six months, perhaps longer if the episodes were popular enough. So, as far as Ash and Rotom knew, their separation would be a long one.