After each member of the Bonne family is defeated at the hands of MegaMan, they make plans to ambush him at Lake Jyun. A large number of Zuuf Gelede and Draches lead the attack, and when they fail, it's time to bring out Tron's latest robot.

The Balcon Gelede is a humongous machine, built for battle in and below the water. When it first emerges from a partially submerged cave, it fires a number of missiles at MegaMan and Roll in their little ship.

Roll suggests a temporary retreat and MegaMan is given the option. Whether in a continued battle or a rematch, Roll steers the boat into a channel. The Balcon Gelede pursues, firing at the boat's backside from beneath the water's surface.

When the channel opens into a small, enclosed lake, the Balcon Gelede takes a position in the center while Roll circles around it with the boat. The giant purple robot continues firing missles and also attacks with its claws. It also has two cannons on the backside.

If both cannons and both arms are knocked out, the Bonnes bring out a more powerful cannon which fires green energy blasts, however it takes some time to charge.

Technical Details