In this episode, we manage to merge the happy-go-lucky world of Gravity Falls with the misery pit that is Bojack Horseman through two characters that share a voice actress: Mabel Pines and Sarah Lynn. 

Do the parallels between these two characters go further than just a common voice? Is it possible that perpetual ray-of-sunshine Mabel exists only in the imagination of a troubled young woman who wishes that was her life? Bring some tissues for this one, it gets pretty sad.