Editing James P. Sullivan

Sulley was initially the top scarer of Monsters, Inc., where he worked alongside his partner and best friend Mike Wazowski. One evening, he discovered Boo's door and accidentally let her loose throughout Monstropolis. While trying to send her home, Sulley grows to care for [[Boo]]. It was during this time that he discovered a conspiracy with Randall attempting to forcefully extract screams from children, starting with Boo. With her help, Sulley and Mike banished Randall to the Human World and discovered laughter was ten times more powerful than screams. Sulley would later become CEO of Monster's Inc.<ref>'''''Kingdom Hearts III'', Sulley:''' "So, Monsters, Incorporated used to rely on scream power from human kids for energy, but now we collect their laughter instead. It turns out laugher's ten times more powerful. And we'd never have figured it out without Boo."</ref>

Sulley is a heavily offensive party member. He uses his {{c|claws|kh3}} to strike at enemies, which deal a good amount of damage. His [[Takedown]] ability allows him to shoulder-check enemies, while his [[Monster Roar]] ability has him unleash a mighty roar that sends shockwaves across the area and stuns enemies. He also has a [[Team Attack]] with Mike and Sora called [[Scream Strike]], where Sora, Donald, Goofy, Sulley, and Mike all roar together, damaging enemies, and then Sora uses Mike as a bowling ball to deal damage to enemies.

{{frm-atk|{{nihongo|'''Continuous Mow Down'''|連続なぎ払い|<br>Renzoku Nagiharai}}|att|Physical|1.0+1.0+1.5|0|0+0+1|0|X|—|—|Scratches with left and right claws once each, then scratches with both claws at once, launching struck enemies.}}

{{frm-atk-m|{{nihongo|'''Jump Slam'''|ジャンプたたきつけ|<br>Janpu Tatakitsuke}}|(hands)|att|Physical|1.0|0|1|0|X|—|—|Jumps high, then slams the ground with both hands and generates a shock wave. The shock wave doesn't affect enemies struck by the hand attack.|(strike)|att|Physical|2.0|0|1|0|X|—|—}}