Essay time?!
I see the opening narration has been updated to include the updated roster for Ash & Go. It's been a hot minute since I had to google search the name of a town, in this case Lilycove City, though I do like that the Water Obstacle Course event takes place in the region with too much water according to IGN (smile). One thing I did like was the scene underwater, showing water pokemon in the Hoenn dex like Huntail, Chinchou, etc and Go's failure at catching a Gorebyss was hilarious (Silly Go this is mainly a Koharu episode), and seeing Dewgong gush over a Gorebyss made me think "This is going to escalate into a problem isn't it?", then lo and behold during the race it happens again and a Huntail, who is later revealed to be the Gorebyss' partner got mad to the point of sealing Dewgong as well as Koharu and Eevee into a cove, and in trying to help them, we see Ash's Dracovish learn Fiscious Rend, so at least Dracovish got something out of this episode, just like Koharu, who was given a Water Stone as an option for Eevee and I do like that Eevee is in no rush to decide what it wants from life, providing further scope for development down the line. Sucks to be Go though, he got nothing from this episode.
On another note, I do like he fake-out that the current opening provides, showing Iris in her original outfit and then the special preview shows her in her BW2 outfit, thus surprising us, though given that Lance reappeared with his HGSS attire, this shouldn't be a shock.