It appeared as the maker of the Unown and stores all their knowledge that they learn outside like an encyclopedia. It uses these to communicate with humans.

Special Ability!

Omniscient

"This ability allows the Pokémon to know the moves that the opposing Pokémon will use next. Whenever an opposing Pokémon switches out, the Pokémon with Omniscient gains knowledge of the moveset of the new Pokémon. This ability can only be activated once per switch, and the effect lasts for the rest of the battle.

This ability would allow the Pokémon to make strategic decisions based on their opponent's moves, giving them an advantage in battle. It also fits with the concept of omniscience, which means having complete or unlimited knowledge"