RGBY didn't have shinies. However, if you trade a mon from RGBY to GSC, it could become shiny, is that what you meant?It was Shiny Onix on Pokemon Red.
RGBY didn't have shinies. However, if you trade a mon from RGBY to GSC, it could become shiny, is that what you meant?
Anyway, my first excluding Gyarados was a Weedle, which I caught and evolved into a Beedrill. My second excluding Gyarados was a Larvitar less than a week later.