Whenever you enter a new room, call up the Status screen and use L1 & R1 to cycle. All of the monsters in that room are
instantly revealed and displayed. If you wish, you can immediately check the items they're carrying by using the CIRCLE button. Successfully using the Analyze spell merely fills in the ??? entries with firm details, enabling you to check creature status info on elemental / type rating defences with the SQUARE button, or individual equipment info with the CIRCLE button followed by status info cycling.