If you trade a starting pikachu from yellow with pikachu in red, will the pikachu still follow you in yellow?
>... A traded Pikachu will also not behave like the starter Pikachu, acting as a regular Pokémon instead (even to the point of being able to evolve with a Thunderstone), unless it matches the OT and Trainer ID number of the player.
Source: Bulbapedia/ Pokemon Yellow Version ___ \m/o_o\m/
