Who are the Bomber Shitennou led by the mysterious Bomberman!?

Having finished a fun trip, a group of Bombermen are heading back home on a passenger shuttle... 4 light balls quickly approach the shuttle. Shaking violently, the shuttle is sucked up into a black hole and finally explodes. With their friends scattered throughout time, Shirobon and Kurobon wake up in primitive times...　 Last time, Bomberman had defeated and driven away Professor Bagura. He has returned, having changed into an electronic cyberbrain mecha. The Bomber Shitennou are a Bomberman assassination force　created for the sole purpose of obliterating Bomberman. Accounting for the flaws in the previous 5 Fiendish Bombers, their weapons have been strengthened, their body armour has been heavily fortified, and a Bagura Chip has been embedded in their thought patterns.