As of .100i, when trying the Boy->Chaser event in the bathroom, the Chaser can, uh... turn into a door, making the door open/close noise. It then stops moving when it has turned into a door and it apparently triggers if you're close to it or not. So, with that being said, the door is the effect that actually ... um, moves...? Err. What I'm saying is that it glitches if you're not close enough to the door, I think. Not sure if they can do spacial-type events in RPGMaker2003, but they ... hecked up that's for one thing.