Predating Hasbro’s Transformers brand, Takara’s toy lines like the Microchange toys became the basis for many G1 toys. Hasbro had licensed many of Takara’s toys to adapt them for the American Transformers brand. Thus, fans love to get their hands on these predecessors to their favorite toys.
Moreover, these Takara toys feature toys that never made it into the Transformers toy line. For instance, aside from the Gun Robo Walther P-38 that became Megatron, there was a Gun Robo S&W Magnum 44.