So I discovered by accident that in some of the battles in US, it isn't essential for the player to win in order to progress, you lose with no blackout, and no respawning at a Pokémon Centre. Happened when battling Gladion after Acerola's Trial, against Lusamine before Poni, and against Dusk Mane Necrozma. (I'm attempting a Metronome Run so I've been losing a lot, took me 25 tries to get past Ultra Necrozma.) I'm wondering how many other battles are like this? The only other time I can think of are the starter battles at the very beginning of some games.