I think Kasumi and Masato were talking about them both having older sisters and such.
On the subject of the cartooney sound effects, I think they were also noticeable when Rocket Dan were popping their heads out from the balloon when they appeared again near the end of the episode. Speaking of Rocket Dan, I was actually laughing at the fact that their machine malfunctioned on its own near the beginning of this episode, causing themselves to blow up rather than Satoshi-tachi attacking (a nice change from the norm, wouldn't you agree?). It was also nice to see Musashi's Habunake actually get in a good solid hit before Pikachu had a chance to attack, and it inflicted poison upon Pikachu as well. Finally, after being portrayed as nothing but a screw-up throughout all of AG, there's at least something to remind people that Habunake was bad enough to have nearly killed Kimori on its first appearance (if you know me, I'm obviously not one to hate the gecko. Just saying that for a Rocket Pokemon to beat one of Satoshi's toughest Pokemon like that is really saying something about it).
As someone pointed out earlier, it seems as though Satoshi's Pokemon Zukan returned to having that male voice. I hope Haruka's at least retains the female voice, though. I found it to be pretty nifty, and considering there are two characters with a Zukan, they could use a little variety between them (Haruka's is already showing that with the cream-coloring).
Alright, what the hell is the deal with Gonbe? It just randomly pops out while the Py, Pippi, and Pixie are using Metronome, and then uses Solar Beam with all of them. Oh well, at least now, its technique isn't a secret and Haruka can actually use the thing now. This further goes against any speculation of Gonbe being another Togepi as well (Togepi's Metronome was always a secret, but maybe if Kasumi knew of its power, she could've actually used the damn egg in a battle).
Oh yeah, and it seems Takeshi's Pokemon Trivia Quiz is void..... but sadly, it seems to only be because Ookido was showing previews of the new movie, as well as the special TV airing of the Deoxys movie. Thing's bound to return by next episode. I wonder when they'll stop screwing with us and have that stupid quiz be gone for good. Give us Ookido's Lectures again. Hell, something like Pokemon de English should be acceptable (showing clips of the dub may not be very appealing to some, but I personally found it ammusing to see the Japanese characters introducing a clip of themselves in our version). ANYTHING would be better than that piece of crap.