Imo its one of the best capture episodes ever. I can't remember two pokrmon being caught at the same time in the anime before but the fact that Cilan caught stunfisk like that was just plain awesome. Oshawott mastering aqua jet and helping Ash get a new pokemon definately made me watch this one over and over. I've probably watched it like 10 times online anim still not bored.
As for how ash uses palpitoad...idk I have a feeling it will be at junipers lab for a little while then it should come back for the fourth gym to take on elesa.