Tron Bonne's famous red robot, the Gustaff, makes its return with a totally upgraded system which allows it to hover around instead of walk or drive.

MegaMan encounters the Hover Gustaff in the Saul Kada Ruins along with Drill Bon, but before battling either he first helps them to destroy a giant stalactite in order to block the flow of lava to the master reaverbot's room.

When Drill Bon later obtains the ruin's key, MegaMan must first face Tron in the Gustaff before pursuing him. The Hover Gustaff has a few different attacks, as well as a shield at its disposal.