In "Weirdmageddon Part 1" as Bill Cipher's world is spilling into Earth, Ford and Dipper plan to stop him. Just then Ford tells Dipper to get back to the shack as the wave heads their way, which changes everything in it's path and brings it to life.
As it heads over the woods it turns Gompers huge, and turns Abuelita into a chair as it washes over Soos' house. It also releases both Rumble McSkirmish and some other video game characters from the arcade.
When Ford prepares to blast Bill back through the Rift using his Quantum destabilizer, another wave passed by and brought the tower bell to life, which then proceeded to cause Ford to miss his one and only clear shot.
Following the death of Bill himself, everything that transformed and brought to life by his weird magic is then restored to normal once more along with Gravity Falls.