Do you really think you're unique? My world had a Miles Morales too. And your life will end as his did; In pain... and misery... by my hand!
~ Wolf Spider to Kid Arachnid

Villains that are either born in an alternate reality, dimension, or universe, or lives in it after permanently altering the space-time continuum. They could also have been born in the mainstream reality, but now choose to reside in another, such as Sunset Shimmer and Rumaki.