Pokémon constellation
Pokémon constellations appear multiple times in the Pokémon games and anime. Currently, no star charts or lore exist for constellations in the Pokémon world.
In the games
Pokémon Snap
Six Pokémon Signs appear on Pokémon Island, and each has a corresponding constellation. Professor Oak draws the connection between the signs and the constellations, and thus forms the theory that the rarest Pokémon, Mew, can be found up in the sky with the constellations on Rainbow Cloud.
The inclusion of Mewtwo as a constellation does not correspond with Mewtwo's role in other games, as Mewtwo was created relatively recently in the game timeline and is not widely known. However, this oversight is generally overlooked.
In the anime
A Friend in Deed
In this episode, Ash and Ritchie stargaze as they camp out. They point out a few constellations, but they seem to create their own instead of locating existing constellations.
Jirachi: Wish Maker
During the credits, once the second verse of the ending theme begins, Ash, Max, May and Brock begin pointing out constellations in the sky. These appear to be Pokémon world equivalents of real constellations (with the exception of Pikachu, which is shown as the equivalent of a single star).
