The Return of Ishtar/Under the Moat


 * Ki and Gil will enter this room through the door at the top-left of it. It contains two Blue Will O' Wisps (their second appearance as regular enemies), two Green Slimes, two Black Slimes, two Red Slimes, two Blue Slimes, two Yellow Slimes, two Pink Slimes, two Dark Yellow Slimes, and two Dark Green Slimes. It's also the second room in the game that can only be reached from the "Password Game Continue" option on the start screen - and its Room Pass, because you'll need it, is 2C2 (same as Museum). It also usurps Upward Passway as the largest room in the game, as you can see.
 * The sole key at the bottom-right of the room opens the door at the bottom-right of the room (there is no key for the aforementioned door at the top-left of the room). The door at the bottom-right of the room leads to Secret Staircase (Room Pass: Q32, same as Library). It not really worth remembering.