Pan-Dimensional Being

Pan-Dimensional Beings are an unnamed race of ancient aliens from the animated series, Gravity Falls.

Biology
Although the Pan-Dimensional Beings don't make an exact physical appearance however,in the episode Dipper and Mabel vs The Future, a Pan-Dimensional Being skeleton is shown briefly in the background. Judging from its' looks, Pan-Dimensional Beings have several limbs, implying they are some sort of an cephalopods and according to Stanford Pine's journal, they are rather bad in what referred to as "horrible sense of direction".

History
Little is known about Pan-Dimensional Beings, expect that they come from a location called Trilazzx Beta and are able to exist in seven to eleven dimensions instantly. They are also known for their "horrible sense of direction" as 30 millions years prior to the show's events, a spacecraft piloted by a group of pan-dimensional beings crash-landed on Earth which created the valley that someday be known as Gravity Falls, Oregon as forming the two bizarre floating cliffs surrounding the entire land. As time passed, the surviving crew aboard the wreck ship died off while their spacecraft was buried beneath surface.