Although folklore has long claimed that Larvesta originated on the surface of the Sun, many early astronomers did not consider that claim credible. This was not because extraterrestrial pokemon were unknown, but because the Sun's extremely hot climate was not expected to allow for pokemon life, and there was no known mechanism for a solar pokemon to reach the earth. Biologists in this period dissented, arguing that Larvesta are remarkably well-adapted for extremely hot temperatures, and noting that the harsh conditions of a nuclear explosion seem to make these pokemon thrive.

Today, the Sun's environment is better understood, and there are known to be portions which are habitable, at least for fire-type life. And many factors in Larvesta's biology, apart from their tolerance to extreme heat, are known to support this viewpoint; their cell structure is wholly alien, their slow maturation unparalleled among earth-based pokemon; some of the pokemon they converge most strongly with have the quickest life cycles on our world.

The means by which the Larvesta arrived here, however, remains one of science's great mysteries. Although the sun is known to eject particles, such as through the solar wind, those are believed to come from the Sun's much hotter corona, where even Larvesta can not survive. And while Larvesta can breathe a great deal of elements, a fact that has allowed them to survive on Earth's very different atmosphere, traveling though space would surely see them run out of air.

At one point in the history of our solar system, a piece of the Sun large enough to carry a breeding population of Larvesta (and likely other solar pokemon, none who survived the journey) must have been ejected from the Sun and fallen onto Earth. But astronomy can not yet supply any explanation for how this impossibility happened.