A solid episode. There are some really memorable scenes here, though they are not related to the main plot of Pachirisu's illness (which, in a way, is bad, since I think ideally the best scenes should be centered around the plot). Gliscor is the real star in this one, with its dejection at being overlooked by Ash in favor of Staravia to get Brock, and then later on its collision into Brock and attempt to act out Pachirisu's illness (Pikachu has competition now!). Croagunk also has a really strong appearance, despite only really being shown a few seconds at a time, maybe 3 times in total.
My favorite scene is the one where Dawn finds Ash asleep, and wakes him up, hands on hips, with a critical tone of voice. Ash immediately flashes her a sly grin, and says he probably shouldn't have fallen asleep. I think this is one of the best Ash-Dawn interactions of the series, and one of the reasons I enjoy pearlshipping. In fact, this exact same scene is used again in the last episode of dp, though then Dawn is doing that more to tease Ash than to criticize him (and he "teases" her back, at the very end of the episode, as he's on the boat to leave Sinnoh). I think this scene really gives Ash a type of personality. Maybe before, if something like this were to happen, I think this would be to show a fault in Ash, as if to say he isn't working hard enough as a trainer aspiring to win a Pokemon league should. You know, Paul probably doesn't sleep on the job. But that's not what this scene is trying to say about Ash, not at all. The way he's smiling...to me, there's alot of confidence in that smile. He's SURE he's going to figure this out, and he's taking it seriously. But he's also having a little fun along the way. He's enjoying what he's doing. And that's amazing to me, and something that I admire. So, I think we're supposed to laugh at this scene, and not be overly critical; Ash is going to find a way, but just by having this little scene here, it makes Ash feel more like someone that's a real person. And that's a good thing. As a sidenote, I think this is also one of the charms of pearlshipping, if there are any, that Ash can have these type of scenes with Dawn. There's no reason at all for him to take Dawn's criticisms too seriously, and he can laugh them off; you know, if Brock were saying this, Ash wouldn't have just gotten off without some serious lecture (Brock drives the pt home about caring for Pokemon to an excessive degree; as soon as TR is blasted off, he picks up right where he left off). Pikachu, as well (Pikachu turns its back on Ash at the beginning of the episode, and doesn't seem to care for Ash's apology).
This is the 2nd episode nearly back to back showing Dawn being brought to tears over not taking care of her pokemon properly. Maybe since the first one was not so well-thought out, this episode was an attempt to show a more polished storyline. But, this is a little too much of the same thing, and I don't think it really does anything for her character. I don't think Dawn's character really progresses from where it is right now until one of her pokemon evolves, and she struggles to get it to obey her.