For those who solely watch the dub, you may be interested in: An upcoming area to discuss the Anime without spoilers/info from Japan.
BW32 - Facing Fear with Eyes Wide Open!
With Trip's observation of Oshawott not opening its eyes to see whenever it uses Aqua Jet still on his mind, Ash decides to take the Sea Otter Pokémon to a nearby lake to practice opening its eyes under water while the rest of the group's Pokémon play together. Having wandered off from the others, Scraggy encounters a group of Foongus and used Headbutt on them! With the rest of the group scurrying over to find out what happened, all of them get caught up on the Foongus' PoisonPowder! Will Oshawott be able to find the necessary herb to heal them which is found only on the lakebed, despite being unable to see underwater?