Shape Shifter

The Shape Shifter is a creature with the ability to take any form and a antagonist in Gravity Falls.

Powers
As it's name suggests, The Shape Shifter possesses near-limitless shape-shifting abilities. It can take any form it has seen, combine multiple forms into one and even take on two separate forms at once. It also has voice mimicking abilities. It can also crawl on walls and ceilings.

Weaknesses
It can copy appearance and voice but not knowledge.