Mini Snapshot Surprise Missions will let players befriend Mew and encounter Psychic-type helpers before Mewtwo makes its Pokémon Sleep debut.
Mew will receive a separate befriending opportunity before Mewtwo arrives in Pokémon Sleep in September, helping players add it to their roster first.
A summer update is planned alongside a special Latios event that will give Pokémon Sleep players another chance to catch Latias; no concrete dates were announced.
Changes are on the horizon for Pokémon Sleep, as well as a special Latios event in which players will also get another chance to catch Latias in. While no concrete date has been given for the changes below, the following have been proposed in an official blog post and are targeted primarily for a summer
Summer Festival 2026 starts August 10 across all areas, marking the first time players can encounter Hawlucha in Pokémon Sleep.
Summer Festival 2026 runs August 10–17, adding Hawlucha while boosting dish strength by 50%, increasing Shiny encounters and bringing back the Candy Cram-o-matic.
Good Sleep Day runs through 03:59 local time July 31, offering up to 2× Drowsy Power, bonus experience, and increased Cleffa, Clefairy, and Clefable spawns.
The August tie-in will bring Captain Pikachu and Tinkatink to Pokémon Sleep as part of the mobile game’s third-anniversary updates, though further details remain unannounced.
Episode 146, “Quaquaval and Tinkaton's Operation: Sleep!”, airs in Japan on August 21, 2026, featuring a Pokémon Sleep crossover with Professor Neroli.
Cyan Beach (Expert) opens August 10, requiring Master 18 on Greengrass Isle and Cyan Beach plus an Expert Ticket; its main berry rotates among Pecha, Pamtre and Oran.
The anime collaboration runs August 17–24, adding Tinkatink, Tinkatuff, Tinkaton and a special Pikachu wearing Cap's hat.
Turtwig, Chimchar and Piplup join Pokémon Sleep during the Third Anniversary Fest starting July 12, alongside changes arriving in version 3.6.0.
A summer update is planned alongside a special Latios event that will give Pokémon Sleep players another chance to catch Latias; no concrete dates were announced.
The Buncha Berries Week Part 2 event runs May 11 at 4:00 a.m. through May 18 at 3:59 a.m., introducing Tyrunt and Tyrantrum to Pokémon Sleep.
The Spring Festival runs from April 27 at 4:00 a.m. through May 4 at 3:59 a.m., introducing Sandshrew and Sandslash to Pokémon Sleep.