Board Thread:Site Problems and Appearance/@comment-5475153-20150123031954/@comment-8161155-20150125150558

Bottomless pit: The episode is canon, as well as the Trooth story ("Mabel, we already know that story, we just lived through it"). The other two stories are not canon.

Little Gift Shop: The whole thing is noncanon.

Shorts: I believe that the first four series (Dipper and Mabel's Guides, Fixin' it with Soos and TV Shorts) are canon as there is nothing that suggests otherwise. I don't regard Mabel's Scrapbook shorts as canon, as the characters are a little off and the premises are somewhat nonsensical, as well as Mabel addressing the audience with no mention of a camera (unlike the other shorts, wherein a camera and/or video editing is mentioned frequently).

The events of games and books are obviously noncanon, although information about the show revealed in them are canon (i.e. Dipper and Mabel never wrote a book and got it published, but Mabel's favorite book is still "True Vampire Blood: The Diary Journal Chronicles: Sequel Moon Descending".)