Apex Bomber is the heavily armed combat support unit and upgraded battle configuration associated with Powermaster Optimus Prime in the Japanese continuity of Transformers: Super-God Masterforce. 

Originally an advanced combat trailer component of Optimus Prime (known in Japan as Ginrai), Apex Bomber evolves into a far more powerful autonomous battle system capable of independent operation when necessary, though it most often serves in direct support of its leader. 

Engineered for maximum offensive capability and battlefield dominance, Apex Bomber transforms from a massive armored trailer into a towering super-robot equipped with high-output cannons, missile arrays, reinforced armor plating, and enhanced mobility systems designed for both ranged bombardment and close-quarters combat.

When combined with Optimus Prime, Apex Bomber forms the legendary super mode often referred to as God Bomber configuration, dramatically increasing Prime’s size, durability, and destructive power. 

This combined form represents the pinnacle of Autobot engineering during the Masterforce era - capable of overwhelming even the most powerful Decepticon forces. 

Despite its immense firepower, Apex Bomber is not merely a weapon, but a loyal extension of Optimus Prime’s will, embodying his strategic precision and unwavering resolve in battle. Together, they stand as an unstoppable force against tyranny, reinforcing the ideals of courage, unity and sacrifice that define the Autobot cause.