Shinies in Gen 1 games were incredibly rare, as they were actually Pokemon with perfect IVs, transferred to Gen 2 to reveal.

Shiny Gen 3 Dragon update: Swablu is one of the few creatures available as a shiny Pokémon, changing its blue body colour into yellow. Otherwise, there are no other signs more Shinies will be added.

Even though ultra-rare shiny Pokemon were only properly introduced in Pokemon Gold and Silver, that doesn't mean that they don't exist in Red, Blue, and Yellow, and one mod will make sure you'll ...