Dipper brings a video game character, Rumble McSkirmish, to life so he can fight Robbie, but when things go too far Dipper realizes he needs to save Robbie. Meanwhile, Mabel tries to end Stan's fear of heights.
Dipper is getting annoyed with Robbie when he accidentally breaks his cell phone and Robbie then challenges Dipper in a fight. Scared, Dipper finds a mystery that brings a character from an arcade game come to life, Rumble McSkirmish, but then realizes he must stop him before he kills Robbie. Meanwhile, Mabel tries to cure Grunkle Stan of his fear of heights.—Anonymous