Purely Meganard centric with no other characters appearing.
Heterochromia you have one eye of your soulmates eye colour and when you meet you get your own eye colour instead of having two different eye colours.
It was odd, being born with one brown eye and one green eye. His parents said it was normal, being born with two different colored eyes. And that when you meet your soulmate, a word that confused him greatly for a long time, your eye color would come back and your soulmate would gain theirs.
His eyes stayed the same color for years. Even after dating a few times. There was no hope for him, it seemed. He gave up. So many years of pain and hearbreak led to him giving up. He became stone cold, unimpressed by everything and everyone. Not speaking unless he had to.
It wasn't until the weeks after Metro Man died that he ran into a blue, badly dressed Megamind impersonator, that he saw what he never expected to. A brown eye that matched his own. Slowly, and with fascination did he watch, the brown eye on the eye of the impersonator slowly turn green.
It seemed the feeling was mutual.
Growing up in a prison wasn't so bad. It was the bullying at school that was the worst. He had no friends, save for his fish minion named, well, Minion. He grew up looking in the mirror and seeing one green eye and one brown eye.
He never imagined that anyone would love a blue freak like him, much less be his soul mate. This tormented him for years, until after Metro Man was killed.
He ran into a man wearing, from what he could see over the cart, was a brown jacket covering a blue sweater. The fair skin led up to puffy brown hair that drew his attention to the eyes. One green and one brown.
His eyes widened, watching the green eye of this man turn brown. Did this mean? Could it be?
The beeping of a watch drew their attention to his wrist. Megamind pulled out his De-gun and shot the man and his cart, stuffing the cubes into his pockets and running to into an elevator.
After a nerve wracking ride down, running out of the museum as it exploded, Megamind ran to the pond by the capital building. He set both cubes down and dipped his fingers into water before flicking it at the cubes.
The cart materialized first, and then the stranger followed.
"You really are Megamind.." He said, sounding... impressed?
"Of course I am. What is your name?" Megamind asked, wanting to know.
"My name's Bernard. And.. I think we're sould mates." Bernard answered, looking into the green eyes that he spent years imagining.