lol pokemon...

For those to lazy to load link/ people it won't load for

 Spoiler

Dawn tells Pachirisu to use discharge (Electric move) on a Hippowdon (A ground type pokemon). It doesn't work. So Ash tells Pikachu to use thunder bolt. Again, it doesn't work. Brock then points out that Hippowdon is a ground type, so is immune to electric attacks. *headdesks* ASH IS SO STUPID!!!!!!!! Dawn could maybe be forgiven as she hasn't worked with pokemon for as long as Ash, but Ash thinks he's going to be a pokemon master oneday, and has been a trainer for ages!!! Team Rocket are equally clueless about it.

When's the last time he stated he wanted to "be a master"?
Jhoto?

Oh, and apparently the director of the anime said something about the anime changing to target newer audiences, expecting that their older audiences have already grown out of it and lost interest. That's why they bring up rudimentary points like this again, when obviously Ash has learned this before. This is also why you hardly hear from older characters as well. The most they get is a 1 episode apperance or something, but then you don't really see them again. They did this with both Misty (Kasumi) and May (Haruka), and will most likely be doing this with Darn (Hikari) when they move on to the new region with the new female lead.

Speaking of which, he said something about making the new female characters more and more attractive, for their newer viewers. This is why May was given a huge bust and Dawn was given wide hips and a miniskirt. (lol)

The anime doesn't really have a sense of continuity. It constantly breaks its own canon and likes to disregard events from previous seasons.