I mean I agree with you that Marshtomp may not get captured and it will just be a typical filler episode that means much of nothing. And even though he may not get Marshtomp, the next episode intrigues me because Centiskorch is listed above Riolu and Dragonite, which is un heard of if it was just a POTD. I don’t remember any merchandise for it either.That's happened for years anyways. Did we get anything for any of the extras from the BW or OS series like Palpitoad and Krabby or for Gligar in DP? Not exactly. Not out of the question that Ash may catch something that was never foreshadowed or mentioned. It's just never really done nowadays to say the least.