Powers: None on his earth of origin (Earth A). When this Leroy Jackson travelled to Earth-616 through Albert E. DeVoor's Atomic Resequencer, his molecules were realigned on an atomic level to match the structure of that Earth's (Earth B) Leroy Jackson (Hammer). Therefore, he possessed all the powers that Hammer of Earth-616 possessed.
Bio: Was one of the characters in She-Hulk #21 that travelled from Earth A (his Earth) to Earth B (regular Marvel Universe) on a vacation as his Earth B counterpart. Was eventually discovered and with the help of Jennifer Walters, She-Hulk (Earth-721) and the Mr. Fantastic's of Earth A and B, was sent back to his dimension of origin.