>>44799392Klang is still a separate species from Klinklang, and it has a very unusual evolutionary method in that the base Pokemon has parts added to it throughout its life rather than fully change on its own. From Klink to Klang, the right Klink evolves into two separate interlocking gears while the left Klink is left alone. Even their names in Japanese and English suggest a progression by adding another gear to it.
Klink to Klang to Klinklang. [Clink] and [Clang]. Metal hitting a surface onomatopoeia.
Giaru (Gear) to Gigiaru (Gegear) to Gigigiaru (Gegegear).
