When Pit enters the center of the Reaper Fortress, he encounters one of the Reapers. At first it looks like a regular Reaper, but then, the Great Reaper assumes his true form and towers above Pit, becoming much stronger. After revealing itself to Pit, the Great Reaper processed to fight him. After a long and grueling battle, Pit managed to defeat the Great Reaper.
The Great Reaper has a vast ammount of abilities. It primarily attack with its scythe when Pit is up higher or try to stomp him when he is at ground level. It can also summon enemies known as Reapettes, like any normal Reaper can except that it has to hit Pit with a death ray shot from his eyes to summon four Reapettes instead of the usual two.
Because of its size, it only has two weak points: its feet (the toes that would be considered pinky toes take more damage) and the Reaper's head. Damaging the head does more damage to it than the toes do. During the fight, the Great Reaper uses a wide variety of attacks, depending on the level that Pit is located.