SM051

(Japanese: がんばリーリエ！決意の家出！！ Lively ! A Determined Runaway!!) is the 51st episode of the, and the 990th episode of the Pokémon anime. It first aired in Japan on November 23, 2017.

Major events

 * changes her outfit into her "Z-powered form".
 * Lillie and Gladion leave for Poni Island together to look for Lusamine.
 * , and Professor Kukui decide to follow Lillie and Gladion to Poni Island.
 * Ash visits Poni Island for the first time.
 * Ash encounters the guardian deities of Ula'ula Island and Poni Island, and, for the first time.

Humans

 * Professor Kukui
 * Lusamine (flashback)
 * Gladion
 * Hobbes
 * Professor Burnet
 * Faba
 * Wicke
 * Hala
 * Gladion
 * Hobbes
 * Professor Burnet
 * Faba
 * Wicke
 * Hala

Pokémon
Who's That Pokémon?: (Japan)
 * ('s; Alola Form; Snowy)
 * (Samson Oak's)
 * (Gladion's)
 * (Gladion's)
 * (Hala's)
 * (Nebby)
 * (flashback)
 * (flashback)
 * (debut)
 * (debut)
 * (debut)
 * (flashback)
 * (statue)
 * (statue)
 * (statue)
 * (doll)
 * (debut)
 * (debut)
 * (debut)
 * (flashback)
 * (statue)
 * (statue)
 * (statue)
 * (doll)
 * (doll)

Trivia

 * Starting this episode, a more serious theme, based on There's Trouble!, replaces the normal title card jingle.