>>31621249he's not wrong. It's a fact.
There were originally 190 pokemon planned for the first gen I but 39 were scrapped due to memory limitation.
Some of them might got into the games in gen II or in later games, or maybe not at all.
I, personally, believe mons like Kingdra, Lugia, Tyranitar line, Magby and Elekid were part of these 39 but, as I've said, some of them might not been part of gen II like Munna (the girl mentioned a pink floral patterned mon) and Tortuga (the beta art) or some might got scrapped all entirely