This game is basically a port of Pokémon FireRed/LeafGreen Version and Pokémon Yellow Version mixed together with some changes to it. It appears to be ported with FireRed & LeafGreen in mind (all the attacks, the TM/HM list, and the types (Magnemite and Magneton are Electric/Steel and Dark moves exist) although almost all the Sevii Islands weren't kept) but reworked to match Yellow's storyline. However, the intro involving catching Pikachu is missing and Pikachu just acts like any normal Pokémon. The overworld graphics primarily use FireRed & LeafGreen graphics, with some graphics from Pokémon Ruby/Sapphire Version and the Game Boy port of Harvest Moon as well.