Lillier and the Staff! (Japanese: 勇者リリエルとアローラの杖！The Hero Lilier and the Staff of Alola!) is the 93rd episode of the Sun & Moon series, and the 1,032nd episode of the Pokémon anime. It first aired in Japan on October 21, 2018, in Canada on March 2, 2019, and in the United States on March 23, 2019 as the first episode of the twenty-second season, Pokémon the Series: Sun & Moon—Ultra Legends.
Today is the sole performance of the Pokémon School play, and everyone’s so excited! Lillie stars as Lillier, a brave adventurer who is charged with restoring Alola’s lost energy using a staff imbued with the power of Legendary Pokémon. But Act Two takes an unexpected turn, as Jessie, in disguise as Jessa Bergère, crashes the performance to steal the spotlight for herself! After some confusion, Rotom Dex writes a magnificent new script on the fly, bringing the crowd (including Ash’s mom) to applause for a job well done!
Outside the Pokémon School, Team Rocket is busy selling their honey-glazed donuts when a play script flies into Jessie's face. She reads the script and fantasizes about being an actress, while James, Meowth, and Wobbuffet look on in concern. Meanwhile, inside the Pokémon School, Ash and his classmates are getting ready for their play. Ash is unable to find his script, and Rotom gives him its own copy. Everyone begins practicing their lines in costume, but they soon become nervous after Rotom informs them that their families are waiting in the crowd. Ash and Mallow take a quick look, just as Delia and Mimey arrive. After Samson Oak welcomes the student's families and close friends to the school, the curtains open and the spotlight shifts as the play begins.
Mallow narrates the scenes as the play's protagonist and hero, Lillier—played by Lillie—arrives before King Sosophocles and Queen Tsareena, played by Sophocles and Tsareena respectively. The King and the Queen grant Lillier the Staff of Alola to gather the power of the Legendary Pokémon. In the next scene, Lillier meets Tapu Koko, Tapu Lele, and Tapu Fini, played by Ash, Mallow, and Lana respectively. Ash silently asks about the next part, but Lillie states that they cannot proceed until all four guardian deities are present. Backstage, Sophocles changes into his Tapu Bulu costume and joins the other Guardian deities, and Lillier asks for the quartet to bestow power on her. Delia calls out to her son, causing Ash to become nervous and temporarily forget his lines, but Mallow reminds him, and the guardian deities call for the Pokémon of Alola, who all start dancing.
The play continues on with a dance scene between the King and the Queen, then Lillier travels far and wide, through the cold mountainside, against a strong gale of wind, and even fights a monster along the way, eventually, she meets the Legendary Solgaleo, played by Kiawe, atop a mountain.
Jessie makes a grand entrance and flies onto the stage disguised as Lunala with James, Meowth, and Wobbuffet holding the supporting rope. The crowd is in awe, but the students are left shocked by the unexpected appearance and Rotom declares the end of Act One before closing the stage curtains. Kiawe demand answers, to which Jessie claims herself to be the great actress Jessa-Bergère and insists the play continues with her re-written lines that gives Jessie all the scene time. The kids are against it, but Rotom solves the problem by deciding to come up with a new script and begins scanning its database for ideas. The students soon spot the rest of Team Rocket trying to sneak away and rope them into joining the school's play.
Act Two opens with a baseball scene. Soon enough, the play descends into a mismatch of themes and multiple acts starring Ultra Beasts, Police Officers, shadows, and Alolan Detective Laki, but the crowd loves it.
Eventually the play reaches its final scene where Lillier seeks the power of the moon from Lunala. Jessie spins around while rose petals are blown around her to create a mystical and enchanting performance. Meowth suddenly loses grip of the rope holding Jessie, but thankfully Bewear appears and stops her from falling. After Jessie bestows the moon's power onto Lillier and declares that she must now return to the moon, Bewear tugs on the rope and sends her flying out of the school's concert hall. Bewear then scoops up James, Meowth, and Wobbuffet in her arms before jumping out of the building. She soon reaches Jessie mid-air before leaping into the distance. Despite Jessie's sudden exit, the play goes on and Lillier declares that Alola has been saved and peace has been restored. As the applause and cheers grow louder, the students and their Pokémon assemble onstage and thank the audience.
Near the beginning of the episode, Jessie is seen dressed as Chigusa Tsukikage from Glass Mask.
The Japanese name for Jessie's fake persona, Musabarbara, is a reference to her Japanese voice actress, Megumi Hayashibara. It may also be a reference to Hayashibara's role as the Batgirl (whose real name is Barbara Gordon) in the Japanese dub of Batman: The Animated Series.
Jessie's outfit choices when she introduces her fake persona are references to some of her Japanese voice actress's roles throughout her career.