Read on below to learn more about Pokémon Sleep:

New Arrivals: Onix and Steelix

It seems that Onix and Steelix have been spotted near Taupe Hollow—maybe this is thanks to the sleep research you’ve all been conducting!
Soon, it may be possible to encounter them during sleep research.

Onix and Steelix Details

• Appearing Beginning:
11/14/2023 15:00

• Appearing at:
Taupe Hollow

• Sleep Types:
Onix: Slumbering
Steelix: Slumbering

Source: Official Pokémon Sleep news