If Sun is active, this Pokémon cannot be statused and Rest will fail for it.
Standard ability
13
Pokémon
Hidden ability
7
Pokémon
In detail
If Sun is active, this Pokémon cannot become affected by a non-volatile status condition or Yawn, and Rest will fail for it. This effect is prevented if this Pokémon is holding a Utility Umbrella.
Pokémon that can have it
20
Standard ability13Any one caught or hatched may have it