Shout-out to MSCKM, Naitdawg, Archinix & Flavajabari
Shiny Existence Thread
This list is a compilation of the community's knowledge on which shiny pokemon exist. The old thread died, then NaitDawgs Edition, then Archi's Edition & then Flava's Edition died as well.
Credits to MSCKM for the general framework.
Generation 1 Pokemon :
Bulbasaur - CONFIRMED
Ivysaur - CONFIRMED
Venusaur - CONFIRMED