Shuckle will be added to Pokémon Sleep starting on January 19th, 2026. There have been reports of a Pokémon appearing that we haven’t seen around here before—maybe this is thanks to the sleep research you’ve all been conducting! It may be possible to encounter it during sleep research sometime soon.

Newly Arriving Pokémon Details

Appearing Beginning - Jan. 19, 2026, at 3:00 p.m. Note: Pokémon Incense for the new arrival can be used starting from the date and time above.

Appearing At - Greengrass Isle, Cyan Beach, Taupe Hollow, Amber Canyon, and Greengrass Isle (Expert).

Sleep Type - Shuckle: Dozing

Main Skill - Berry Juice (Energy for Everyone S)
Restores some Energy to all helper Pokémon on your team. Sometimes additionally gets you a Berry Juice
Note: Berry Juice restores 20 Energy to a single helper Pokémon, and you can hold up to 5 in your bag.

Source: https://www.pokemonsleep.net/en/news/333532393337353930363032353936333533/