>>30828861>According to interviews with Ken Sugimori in Nintendo Dream, Basculin was created late in development when they realized there were few new 'standard' fish-like Pokémon in Unova, the only others being Alomomola, Stunfisk, Frillish and Jellicent. It was given two forms to make up for the small amount of fish in the region, and based on a bass since there are wild bass in New York state.Basculin was designed last minute simply because there weren't enough fish. It is LITERALLY a fillermon
