>>58845437>Venusaur The most unpopular starter and even the devs knew this, so no-one has one
>Pidgeot Trainers dump their Pidgeotto halfway through their journey once they realise better Flying types exist
>Eevee + Eeveelutions Newly discovered when Protag's journey starts, Bill knows about them. Protag/Rival are among the first trainers to ever own one, and by GSC 3 years later, lots of trainers own the Eevee forms
>Legendaries Only one of each, all caught/defeated by the Protag
>Fossil mons While the girl in Mt. Moon does acknowledge the fossils, she may have been talking about different fossils - it's possible the Nerd that found them initially was the first one to find specifically Omanyte and Kabuto fossils.
>Snorlax Only two KNOWN in during the events of RBY
>Electabuzz, Magmar and Ditto It's arguable that with the Power Plant and Pokemon Mansions being pretty much abandoned, no other trainers would encounter them
But yeah, the others on your list are a real mystery, especially Psyduck and Krabby.
