User blog comment:Littlegoodboy/Dipper and mabel switch!/@comment-5539085-20130117001958

I think he would notice a difference in them, but not that they switched bodies. Maybe he'll think that they're impersonating eachother or something? IDK. But Stan really doesn't pay much attention to Mabel & Dipper so... ya. IDK. But btw, Alex Hirsch did say that a bodyswitching episode was gonna come out in season 1. Yay! That means it has to be one of the next 8 episodes not including "Boss Mabel". Since there are 21 episodes in a Gravity Falls season.