Pokémon Yellow Version/Changes from Red, Green, and Blue/Pokémon Unobtainable in Yellow

The following Pokémon are not obtainable in Yellow. In order to obtain any of the below Pokémon, they must be traded from one of the previous Generation I games, or from the Generation II games, which has that Pokémon available, which will be indicated.

Note that "" indicates a Pokémon that can be caught in the, and thus in the as well. "" indicates a Pokémon obtainable in the.