→Trivia: These were part of the Johto League arc, but didn't take place in Johto at all. "Core series region saga" is to exclude OI and DA, as those had a few episodes not taking place in those regions (EP081, EP115, EP116, BW141 and BW142).
** Both of them also recite their respective in-game [[Gym Leader]] slogans during their one-on-one battles.
* [[Pokémon.com]] [http://web.archive.org/web/20171123194819/https://www.pokemon.com/us/pokemon-news/ash-returns-to-where-it-all-started/ mistakenly stated] that the episode would debut in the United States on December 2, 2017, which was one week before the actual US debut.
* This is the season finale of ''[[S20|Pokémon the Series: Sun & Moon]]''.
* Music from ''[[M19|Volcanion and the Mechanical Marvel]]'' is used as background music.