Akkipeddi
All set to be a nice guy
Just because a totem pokemon is appearing doesn't mean this will be a trial.
The summary indicates that this episode is focused on Lana and that Ash and Lana are having fun fishing, it says absolutely nothing about a trial or Ash wanting to beat a totem pokemon.
Also, where are people getting the idea Lana will give Ash the water Z-crystal? She is not a trial captain in the anime, just a student, and she didn't get any crystal in the past episodes nor there is any hints that she will.
She might get it in this episode, but why would she give her crystal to Ash? She is the one who specializes in water pokemon.
I thought people were speculating the opposite, where Ash would beat Totem Wishiwashi and then realises he doesn't have a water type, and so ends up giving the Waterium Z to Lana. Anyway, I agree that there probably won't be a battle this episode, although it could be the set up for Ash's trial against Wishiwashi.