Talk:Mysterious Door/@comment-186.78.91.157-20151030192829/@comment-4332975-20151102214202

The W.D. Gaster content fairly well confirms that datamining and editing game files is "canon" in Undertale. My guess is that "you will have to patch" is literal, in this case. The data is dummied out, and you have to patch the game yourself in to make it work.