My first shiny was found on the snowy path in the Sinnoh region.
I was using my PokéRadar to find a Snorunt. While searching, I saw something glimmering in a grass patch.
When I looked, I was so surprised!
It was a shiny Sneavel.
It was tough. Took me several attempts to capture it.
I nicknamed it Diesel (strange, I know).
It is to this day my first, and only, shiny Pokémon so far.