User blog comment:GizmoTheMeme/So are Slappy and Mr. Wood brothers or not?/@comment-31328951-20170327150405

It says on the character stats at the end of the special edition of "Night of the Living Dummy" that they were both carved from the same cursed coffin and it reveals that they are both brothers. So yes,they are both related 😊😊😊😊😊😊😊😊😊