Originally Posted by
CJC
Yes. The item dropped by enemies is the screen item, whereas the item found in the cellar is the Special Item.
Set the Enemies->Item enemy flag in screen data, set the Item to Map, and then set the room type to Special Item and set the Special Item to whatever you want in the cellar. Then place a Cave/Item Cellar tile warp on the screen and include some stairs that match that warp letter (So Stairs A combo for an A warp). You'll probably want to trigger the stairs with the Stair Flag, which is in the bottom hud of the editor, and then set the Stairs secret combo to a Stair combo.