Not gonna lie, the last thing I expected to see was a group of Pikachu mining for Thunder Stones.
That evolution tease though, Ash getting concerned that his Pikachu evolved only for the chase to continue anyway. I knew Ash's Pikachu wasn't going to evolve, but at least we finally see a female Raichu without the tail tip, and it's the first time since Brock's Lombre 741 episodes ago that a main character's pokemon evolves via a stone.
Also, Go clearly hasn't skipped leg day when he ran up that steep cliff to take back Pikachu, that was amusing.
Jessie: Can these cute pokemon do anything?
Me: Silly Jessie, they wouldn't be in the vending machine if they couldn't. Also let's not forget the amount of times she got beat by Dawn's Buneary (like in the Grand Festival for instance).
One other thing I liked was that TR's Pikachu van reminded me of some of TR's old mechas, immune to one or two things (like electric attacks), but vulnerable to everything else. In this case, the van was Pikachu-proof but seemingly not Raichu-proof.