Encountered only in the Waterworld level of "The Mercenaries", the Double Chainsaw Ganado is equipped with a chainsaw with two blades. The double chainsaw Ganado is extremely hard to defeat and runs around flailing his chainsaw similiar to how the Garridors wield their claws. Touching the chainsaw or even getting close the Ganado means instant death. So either take him out early or avoid him completely. Your best bet is tripping him up through shooting his legs.