shiny Pokémon [shahy-nee-poh-kee-mahn]
1. Video game. Introduced in Generation II, especially with the in-game event Pokémon, Red Gyrados, these alternated colored Pokémon are extra-ordinarily rare. The odds of seeing, much less catching, one of these ultra-rare alternate colored Pokémon is approximately 8 in 65536.
EX. No, I don't think I've ever seen a shiny Pokémon on one of my cartridges and, besides Gyrados, I've never caught one. The funny part? Some shiny Pokémon aren't that different and, while grinding, you might not even notice.