Henry Pym (Earth-5029)

"The Pym Particles were a scientific breakthrough, but if they were available to the public then the results could be disastrous, and if everyone could shrink, what would be my purpose?"

- Atom

Hank Pym is a selfish scientist who created "Pym Particles" which allow him to shrink down to microscopic size and he is a member of the Justice League.