The Pokémon Company has revealed special dedicated content featuring Diglett and Wiglett:
[Official] Digda♪ Digda♪
Creating a relaxing environment with Wiglett 🏖️
Boasting an exceptional sense of smell, Wiglett is able to pick up scents from over 60 feet away. When it notices the scent of other Pokémon, Wiglett burrows into the sand to conceal itself.
Source: The Pokémon Company
Source: Pokemon