Instructions
Press the "B" button repeatedly to win the initial chainsaw duel against Skorge. Once he has been cut with the chainsaw, he will run from you.
Roll away from Skorge's smoke grenades when he throws them at you. Press the "A" button and move the left analog stick simultaneously to roll.
Shoot any tickers, small crab-like creatures, before they get close to you. Tickers will explode when they are close to you, heavily damaging your character.
Avoid the falling rocks Skorge will cut down from the ceiling by rolling away from the falling rubble.
Roll in the opposite direction of the falling pillar when Skorge cuts it down and pushes it towards you.
Press "B" rapidly when Skorge initiates another chainsaw duel. He will attempt another duel when you have avoided his attacks for a minute or two. When you are successful in the duel, you will cut him again.
Continue to avoid Skorge's attacks until he initiates a third chainsaw duel. Win this duel by pressing "B" rapidly to defeat Skorge once and for all.