Shiny Pokmon are a rare variant of Pokmon that have a different coloration compared to their standard counterparts. They were first introduced in the second generation of Pokmon games, Gold and Silver, and have since become a popular target for collectors. There are a few different ways to obtain shiny Pokmon, but the most common is through random encounters.
The odds of encountering a shiny Pokmon are very low, but there are a few things that can be done to increase the chances. One is to use the Masuda Method, which involves breeding Pokmon from two different regions. Another is to use the Shiny Charm, a key item that can be obtained after completing the Pokdex. Finally, there are a few Pokmon that have an increased chance of being shiny, such as Gyarados and Eevee.