I was pleasantly surprised by this episode. The made-up Ghos conjured up by the ghost-type pokemon was animated REALLY well, and the rest of the episode looked great as well. And, as others have mentioned, Sonansu's romance with Kirlia was great as well. I also thought the part at the beginning, when Haruka thought that "ghost town" meant that the town was actually inhabited by ghosts, was pretty amusing.
I am annoyed, however, that the show is pulling a Kids' WB! on us and putting part of the show before the opening theme. I mean seriously, why the hell is TV-Tokyo bowing down to Kids' WB! so goddamn much? If you're going to do this much for them, why don't you go ahead and dub the show into English so that 4Kids won't have to?
Also, the new Pokemon Trivia Quiz sucks. At least the questions Takeshi came up with were challenging and somewhat clever.