An episode about a search for a treasure chest can be a fun episode - at least for me - and this was no exception. Kind of funny to think that it's a chest of evolution stones that, in the end, serve to evolve three Eevee into their classic evolutionary stages in the end, as if the anime can't promote the Eevee family enough. But that's fine, and it was still a rather enjoyable episode anyway.
I liked the part when TR sends out their Yamask and Woobat to battle the heroes, but their Pokémon were too exhausted to battle, and then Pikachu blasts them off the island without a fight. Lol.