Pikachu darted onto the scene with the 1996 ... there were once plans for a third evolution following Raichu named Gorochu. This extra evolution never made it to the game due to worries about ...

named "Gorochu." However, the evolution was scrapped, as planner Koji Nishino described in an interview with Pokemon.com: [In] the game specifications, Pikachu ended up being the kind of Pokmon ...

There was, however, originally supposed to be a third evolution of Pikachu that came after Raichu called Gorochu. This was ditched due to cartridge space concerns in the original games ...