Friday the 13th: The Series S01 E08 Shadow Boxer

A cursed set of boxing gloves makes their owner unbeatable in the ring...while his shadow goes out and beats an innocent to death. The trio manage to recover the gloves, but the boxer they stole them from breaks into the shop and hold Micki at knifepoint until he gets them back. To beat him, Ryan has to beat Jack with the gloves so his shadow can defeat the boxer.