I´d be lying when I say that I highly enjoyed this mini-arc. The lake episode was boring except for Kouhei and the ghost episode was somewhat nice, but nothing too special. But nevertheless, the first episode of this mini-arc was brilliant and today´s episode surely made up for the lame lake-episode.
It had a lot humor, awesome characters like Kouhei and Jessie had more than enough moments to shine, cool animation, lots of different Pokemon ( too bad most of them didn´t get much screentime...) and even some cute scenes beside Mr. Tomboy-lover and Mrs. Tomboy.
Aoi needs to return later in this series. Preferable as a Masamune-like rival during the league. I really like her, for some reason she reminds me of Seiya from Sailor Moon...maybe because her japanese VA sounds kinda like Seiya´s German VA...
I wish we had seen more of her Pokémon though.
Kouhei quickly jumps into my top 10 list of my favourite characters ( wait...I don´t have such a list....but..urrr..you know what I mean ^^ ). ALL of his scenes in this episode were awesome. His digging through the ground, his diving under Hikari and Brock ( he sure likes to be underground), his fanboying over Hikari and Musalina, his funny walking, how he crossed the finishing line etc.
Like Aoi, he NEEDS to return. As he is kinda linked to both, Hikari and Musalina, a contest with him would be more than awesome.
Too bad Brock didn´t even mention his own Onix when he got his rental one. Or did he?
And as stated before, I think some rental Pokémon could have needed some more screentime like the spring-pig or the Hippo ( because it deserves more screentime with a good AD after its HORRIBLE debut episode) and...of course...the rentals from episode 1 of this Summer school arc.
I can´t help it but think that this arc would have been so much better if the first rentals would have stayed with the characters for the whole arc.
I liked how Ash and Aoi had a nice little moment at the end of the episode. Yeah, I´m a sucker for moments like that...-.-
I found it really cute how Musalina reacted towards her own little fanclub at the end when they thanked her. How unexpected. Jessie really is a GREAT character. She doesn´t get enough love in the fandom
I wish Kouhei had some kind of goodbye but instead we saw how he picked up some food...meh...
Looking back, this arc wasn´t perfect and not all episodes were enjoyable, but I liked the feeling of it. Kinda like YuGiOh-GX ( not that I´m into YuGiOh

). I like school themed scenarios and it was refreshing to see something like this in Pokémon.