Shiny Pokémon

A common staple in Pokémon games are Shiny Pokémon and Pokémon Sleep includes them within. On rare occassions, when you attract Pokémon to the area after you sleep, there is a slim chance that the Pokémon will appear as a Shiny Pokémon.

These Pokémon have the same befriending requirements as all other Pokémon, needing you to give them biscuits to befriend them, but they will always be hungry and will join you after just one biscuit. They have no further bonuses and are largely an aesthetic change.

In addition to the wild Pokémon that you encounter in Pokémon Sleep that can be shiny, there is also a chance that the Snorlax you get as you start of the week will also have the chance to be Shiny. Like the other Pokémon there's no added benefit for it.