Sun
Its body is gaseous and frail. It slowly grows as it collects dust from the atmosphere.
Moon
In ages past, it was called the child of the stars. It’s said to be a Pokémon from another world, but no specific details are known.
Ultra Sun
Even though its helpless, gaseous body can be blown away by the slightest breeze, it doesn’t seem to care.
Ultra Moon
Whether or not it’s a Pokémon from this world is a mystery. When it’s in a jam, it warps away to a safe place to hide.
Sword
This Pokémon came from another universe. Its gaseous body is so light that even a gentle breeze can blow it away.
Shield
Cosmog is very curious but not very cautious, often placing itself in danger. If things start to look dicey, it teleports away.