Solgaleo
The Sunne Pokémon
Type: Psychic/Steel
Official Registration #: 791
Entry: The evolved form of cosmoem, by battle experience. According to Alolan legend, this legendary beast came from another world and devoured the sun, then shone the sun’s light from its body before … departing to another world, apparently. Which would take the sun with it, yet not only does the sun still exist, but also, Alola is well-known as being an incredibly sunny region. Also, this pokémon, despite the fact that it radiates light and heat, is not a fire-type at all, and this world is often a fantastic, wonderful place where some things defy any sort of explanation whatsoever.
Lunala
The Moone Pokémon
Type: Psychic/Ghost
Official Registration #: 792
Entry: The evolved form of cosmoem, by battle experience. According to Alolan legend, this legendary beast came from another world and devoured the light of the moon. Which, if one thinks about it for any length of time, makes a little less sense than devouring the light of the sun, but honestly, the author has given up trying to make sense of legendary pokémon at this point.
The Pokédex According to Bill 