The arch enemy of Nemesis (in Greek mythology) was Echo and Narcissus, who she lured and killed. She is often mentioned as the God of revenge or remorselessness.
An arch rival or enemy might be your nemesis.
Metro man is megaminds arch nemesis
Arch Nemesis was created on 2005-02-22.
Nemesis is the best choice. Other words could be enemy, adversary.
A superhero's worst enemy is typically referred to as their arch-enemy or nemesis. This is the character who poses the greatest threat to the superhero and is often portrayed as their main adversary.
TV Tropes I believe list the Thinker as the arch-enemy of the 1940's Flash, Gorilla Grodd as the arch-enemy of the Silver Age Flash, Professor Zoom as the arch-enemy of the Flash in the Bronze Age, then Vandal Savage, Abra Kadabra, Captain Cold and Zoom II as arch-enemies of Wally West at one point or another. His arch-enemy is usually considered to be Cold or Professor Zoom though.
Dogman
Skeletor
Skeletor
A meaningless phrase.
enemy
It's like in those superhero movies... Also called an arch nemesis. It's pretty much someone who you'll never forgive and try to fight your whole life.