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However, he went after the Jerk Jock first because he used to tease him.
The entire universe laughs at Emmitt; he dyes his hair black and puts on a fake mustache and the laughter instantly turns to fear.
Alternatively Emmitt is a comedian.
Zig Zagged: Emperor Evulz goes after a former Jerk Jock, then later claims it was because he had a part his "Machine O' Doom" needed. But he didn't necessarily need to attack him first. However, his next few victims didn't tease him...but the last one did.
Averted: Emperor Evulz' life of evil isn't caused by teasing.
Enforced: "It's not like the fangirls need an excuse, but still; why don't we give the bad guy a sympathetic backstory? We could have his life of evil be caused by relentless teasing."
Lampshaded: "Let me guess. You were bullied in high school, so you decided to become a bad guy."
The local Jerk Jock quarterback is really a Nietzsche Wannabe who hates existence itself; so he teases the already-unstable Emmitt Everson in hopes that this trope will occur.