Atom-Smasher (Arrowverse)

"Atom-Smasher", as dubbed by Martin Stein, was a meta-human who shared a resemblance to Albert Rothstein, the dead Nuclear Plant employee.

Biography
At some point, Atom Smasher was told by Zoom that he would return back to Earth 2 if he managed to kill the Flash. After murdering his Earth 1 counterpart, the Flash and his associates attempted to fight back, however Atom Smasher fled. The team were later able to pinpoint Atom Smasher's location at a hazardous waste reclamation plant.

Barry tried to stop him, however Atom Smasher choked him and Barry was able to escape when Cisco activated the security alarms. The team for a final time caught his attention with a distress signal in the shape of lightning bolt. The idea came from Cisco would got it from a comic book.

Atom Smasher chased Barry to a nuclear plant and was tricked into entering a reactor core where he was given too much radiation which he absorbed. As Atom Smasher was dying, he confessed to Barry that he was coerced by Zoom in return for a way home.[1]

Abilities

 * Radiokinesis: Atom-Smasher was able to absorb radioactivity and harness it, even if the source of the radiation is vast distances away After absorbing the radiation, his physical parameters became significantly increased.
 * Superhuman strength: Atom-Smasher also had significantly enhanced strength compared to a normal man. He could easily lift up and throw a food stand several meters and likewise swat away full grown men with a single blow.
 * Superhuman resilience: His skin was extremely resilient, bullets ricocheting off when fired at him. He also took many of the Flash's speed blows without really being phased at all.[1]
 * Superhuman mobility: The strength is his legs made him very fast and agile, being able to tail the Flash while he's running at super speed by running and leaping.
 * Size manipulation: Using his accumulated radiation, Atom-Smasher could increase his size to significantly bigger than normal, usually twice his own size. This allowed him to proportionally increases his strength and resilience even further.

Season 2

 * "The Man Who Saved Central City" (first appearance, but he died) 

Extra Facts

 * Atom-Smasher was named by Martin Stein  instead of Cisco due to his ability to absorb atomic power, as well as simply smash things. Cisco would usually be pissed off if someone else named the meta humans instead of him and Ray Palmer, however he hugged Martin for that one.
 * In the DC Comics, Albert Rothstein is a hero known as Atom Smasher.
 * In the JSLA comics, Atom Smasher's villainous turn is similar to his appearance on the Flash.