Ep. 56: The Mystery of Principal Oak's Sleeping Komala and Jigglypuff's Musical Return
Aired on December 28, 2017

56
Students at the Pokémon School learn about Principal Oak’s Komala after Samson demonstrates its unique ability to battle while asleep. The lesson is interrupted by Jigglypuff, whose song puts the class to sleep, leaving angry scribbles on their faces. Komala remains unaffected, which frustrates the singing Pokémon as it repeatedly attempts to wake the sleeping creature. Samson devises a plan where Komala uses the Sleep Song to put Jigglypuff to sleep instead. Komala then draws on the sleeping Pokémon's face. Upon waking, Jigglypuff finds the situation hilarious rather than offensive, resulting in a new friendship between the two.
Episodes
- Ep. 52 · The Island Guardians assist in Nebby's evolution into Solgaleo at the Altar of the Sun.
- Ep. 53 · The Team Rescues Lusamine from Ultra Beast Mind Control
- Ep. 54 · Ash and Gladion defeat the Ultra Beast with a new Z-Move to save Lusamine
- Ep. 55 · Kukui proposes to Burnet and the class joins the Ultra Guardians after a surprise wedding.
- Ep. 56 · The Mystery of Principal Oak's Sleeping Komala and Jigglypuff's Musical Return
- Ep. 57 · Rotom Dex swaps bodies with Wash Rotom and accidentally takes over the Pokémon Center.
- Ep. 58 · Team Rocket resolves a romantic conflict involving Mareanie, Toxapex, and James after a poisoning incident.
- Ep. 59 · Harper and Sarah credit a Pokémon for their rescue, prompting a search for the creature known as Grandpa Forest.
- Ep. 60 · Lillie and Snowy practice Pokémon Sled Jump with Cerah at Mount Lanakila