Can you switch Pokemon in a league in the middle of battles? (anime)?

Ash only substituted his Pokemon when they defeated another one, in Unova, Kalos, and Alola leagues. For example, Pikachu and Dewott are battling; Ash wants to use another Pokemon, so he waits to beat Dewott, and then he will use another Pokemon.

He wouldn’t do what he did in the Orange Islands and all those places. For example, Ash’s Lapras and a Dragonite are battling; Lapras has taken a lot of damage. Ash will substitute straight away, not defeat Dragonite with his Lapras first. Why is that?

Pleaselog inorregisterto add a comment.

Ok, I’m going to answer this the way you wanted it to be answered. But first, I’m going to say that the answer given was perfectly fine. You didn’t ever say that you were referring to the anime, and he is correct about the boxes. So, next time, I recommend specifying about what you’re asking, because people put work into answers, and then saying that you were asking something completely different, when you hadn’t mentioned it before, that just wastes their time.

Anyway, yes, trainers have added Pokémon to their team during the anime. In the XYZ saga, Ash adds Goodra to his team halfway through the Pokémon League.

I hope you enjoyed this answer.

In generations 1-7, up to Alola, no. You had to stick with the maximum of six you brought to the League.

However, in LGP/E, the boxes are available anywhere, allowing you to change team members between battles. In Sw/Sh, unlike LGP/E, you are unable to access the boxes during the League.

Hope I helped!

Source: Experience and Spex’s comments