Monsters Inc. (2001): Monsters generate their city's power by scaring children, but they are terribly afraid themselves of being contaminated by children, so when one enters Monstropolis, top scarer Sulley finds his world disrupted. Monsters University (2013): Mike Wazowski and James P. Sullivan are an inseparable pair, but that wasn't always the case. From the moment these two mismatched monsters met they couldn't stand each other. "Monsters University" unlocks the door to how Mike and Sulley overcame their differences and became the best of friends.