Balzion is the mecha of the Anti-Bio Union utilized by their robotic assassin, Bio Hunter Silva. Its search and battles are the central element of the later stages and end-game of Chodenshi Bioman.

Balzion is built to be the antithesis mecha of the Anti-Bio Union to counter Bio Robo, the main mecha of those who fight with support of Bio Particles. It has great strength and flight capabilities; with its ultimate weapons being its Anti-Bio Particles Beam and its Balzion Maser sword.

Balzion was constructed by the Anti-Bio Union alongside Silva as their ultimate weapons to defeat the Bio Particle faction during the Bio civil war 500 years in the past. The mecha proved its formidable nature in crushing any Bio Particles or beings that possessed them with its robot partner, which both furthered their side but likewise contributed to the hastening of the final destruction of the world. When Bio finally blew up due to Anti-Bio Particle over-exposure, Silva escaped with Balzion in pursuit of Peebo and Bio Robo, both of which escaped the planet in hopes of reaching the paradise known as Earth.