Ash finally feels like someone who's been doing this for a decade, not resetting every region. N arrives asking the question the show spent twenty years avoiding: what gives you the right to catch these things? The series doesn't answer it, but watching Ash actually sit with that doubt instead of brushing past it changes everything about why he's out there.
After the Isshu League Higaki Tournament, Satoshi, Pikachu and their friends head out on a new journey to the White Ruins, a site found by Professor Araragi's father and tied to the legendary Pokémon Reshiram. There they meet N, a mysterious youth who says he can understand what Pokémon are saying. The group soon gets caught up in a sinister experiment run by the Plasma Gang, and the work of the enigmatic scientist Achroma turns even Pikachu and Kibago against them. Plasma Gang leader Ghetsis reveals that the gang has been searching for N, while the Rocket Gang trio returns to the Isshu Region on a mission that sets them against the Plasma Gang. The 14-episode arc mixes action, adventure, comedy and fantasy.