This article is about an episode of the Pokémon animated series that has not been dubbed into English. As such, its coverage may contain romanized Japanese names, rather than dub names.
The First Day of the Rest of Your Life! (Japanese: サトシとラストバトル！セレナの選択！！The Last Battle with Satoshi! Serena's Choice!!) is the 138th episode of the XY series, and the 937th episode of the Pokémon anime. It first aired in Japan on October 13, 2016 and is scheduled to air in the United States on December 31, 2016. However, this episode was leaked via Canada's Teletoon on Demand service on December 15, 2016.
Spoiler warning: this article may contain major plot or ending details.
The English dub was leaked via Canada's Teletoon on Demand service on December 15, 2016, sixteen days before the episode airs in the United States.
In one scene, when Tierno is infatuated by Serena, Shauna pulls him away from her by the ear, a reference to the running gag of how Misty and Max used to pull Brock away from the beautiful girls he was attracted to.
As stated by Ash himself, the battlefield where he and Serena have their battle is the same one where Ash had his first battle with Clemont on his first day in Kalos.
In the Japanese airing, this episode was followed by a preview for the Sun & Moon series.
DreamDream is used as an insert song and as the ending theme for this episode, with this version being sung by Serena's Japanese voice actress, Mayuki Makiguchi.
The insert song version uses the first half of the song while the ending version uses the second half.
At the beginning of Serena and Shauna's performance when Serena commands Braixen to use Flamethrower, the position of her Pokémon change from being (from left to right) Pancham, Sylveon and Braixen with Serena standing to their right to Braixen, Sylveon and Pancham with Serena standing in between Braixen and Sylveon.
This is due to the fact that the clip was reused from an earlier episode.
When Serena and Shauna walk up to Jessie after she and her Gourgeist make their entrance, Shauna's Flabébé is initially shown to be floating behind Shauna, but when the shot changes, Flabébé is in front of Shauna.
During Ash and Serena's battle, Braixen began executing its Fire Blast before Serena could finish calling out the attack.
