In the games
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Reason: images (current Mewtwo image is the Pokémon sign, not constellation).
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.
When visiting Camp Starlight during clear weather, there is the option to stargaze. The constellations in the game are the same as those noted below in Jirachi: Wish Maker, which was released in Japan a week before this game. Pressing A when a constellation is selected provides information about each one.
- The Teddiursa Constellation consists of seven stars. It is said that if a crescent moon were to shine on Teddiursa's forehead, those who saw it would enjoy terrific dreams.
- The Ursaring Constellation is composed of seven brilliant stars. It has been long adored as one of the constellations of the springtime.
- The Milotic Constellation encircles the Teddiursa Constellation as if it were providing comfort. It casts its beautiful glow in the northern night sky all year round.
- The Seviper bearer Constellation boldly claims a spot beside the Gligar Constellation as its own. The Bearer keeps a firm and unbreakable grip on Seviper's head and tail.
- Gligar is a star constellation that is renowned for decorating the sky on summer night. Connect the stars arranged in an "S" shape, and a Gligar appears.
- This star constellation [The Kyogre Constellation] crosses the Milky Way as if it were Kyogre moving across the starry sky. It is an impressive summertime sight.
- The Gardevoir Constellation is the second largest among the night's star formations. Its elegant appearance is sure to impress all that see it.
- The Pikachu Star is one that glitters brightly in the skies on summer nights. The Pikachu Star is always smiling near the Gardevoir Constellation.
In the anime
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).
- Teddiursa - Ursa Minor
- Ursaring - Ursa Major
- Milotic - Draco
- Machoke and Seviper - Ophiuchus and Serpens
- Gligar - Scorpius
- Kyogre - Cygnus
- Gardevoir - Virgo
- Pikachu - Spica
Several constellations were seen in this episode.
The Braviary constellations are seen in this episode.