Legendary Pokémon

As with many Pokémon games, Legendary Pokémon can be found throughout the game. In Pokémon Pokopia, they act much like other Pokémon with their own specialties, desires and so forth but there are a few changes

First, to recruit a Legendary or Mythical Pokémon, you will have to find them on a Dream Island. This is a small random chance when going to one of the dream Islands while using the Ditto Doll or the Substitute Doll. When you encounter them there, they will then follow you back to the region.

Legendary and Mythical Pokémon have a greater effect on the Environment level of the area you bring them to. As you improve their comfort level, it becomes easier to raise the entire environment level of the area

Mew is a bit different in how it is found. Unlike the random ones found in the Dream Island from the get-go, or the ones that you find in the story before finding them in Dream Island, here you need to find 28 different Mysterious Slates. These can be found randomly in shiny patches of ground. Then, take then to the ruins near the Pokémon Center in the Withered Wastelands. Put the blocks on the corresponding tile to make a Mew picture and Mew will then be available to find.