Porygon

“A POKéMON that consists entirely of programming code. Capable of moving freely in cyberspace.”

— Pokémon Red

“The only POKéMON people anticipate can fly into space. None has managed the feat yet, however.”

— Pokémon Yellow

“It is a manmade POKéMON. Since it doesn't breathe, people are eager to try it in any environment.”

— Pokémon Gold