The Raw Shock is a monster, and the only hostile creature encountered in Silent Hill: Shattered Memories. They pursue Harry Mason during each nightmare sequence, and only appear during Ice World transitions.
Also in the novel, Raw shocks are trying to stop Reynard. These monsters are first seen by Rey while evading the Lock - Jaw. It is not necessary to fight these monsters. If Rey were being chased by Raw Shocks, he has to find a glowing door at the edge of every building as the exit.
In the novel, this monster symbolizes a warning saying "You should'nt have got in here!" adding guilt for Reynard.