Best Join

Best Join was a Taiwanese toy company which served as the pre-Transformers manufacturer for 1985's "Radio Robot" - a Transformers bootleg mashing together Generation 1 Megatron's head, Blaster's hops, Omega Supreme's arms, and Soundwave's lower legs - that was strangely released in 1987 by Argentinian company Comando Toys as Radio AM Robot, fully bearing the official Transformers license.
It is possible that Best Join is a rebranding of another Taiwanese company called Tai Fong, as they had released another Transformers-inspired working radio toy called "Robotic Radio" just the year before which uses the same pieces for the dials and has a similar copyright stamp. Notably, Tai Fong released quite a few other Transformers-like toys [1], whereas Best Join seems to be virtually unknown besides their Radio Robot (the company's name doesn't even show up on the packaging of its only known pre-Comando Toys release, only on the copyright stamp in its rear!).
Best Join moulds released as Transformers
Robo Terminal
- Radio AM Robot - Robo Terminal Radio Robot, featuring different Spanish-translated stickers
