OK when you go into the telephone room when the lights are out the professer will call and say there is a gost that likes to stay in dark places and a room that is filled with mirrors.Uncle Grimmly is the gost your looking for and he will be in the wardrobe room up stairs. When you get there make sure luigi is saring at you and the uncle grimmly will show up. When he raises his arms and makes a noise thats when you see his heart and then you suck him up. Sorry this a long descrition to read but many people have a problem with this guy. Hope this helps ^.^.