i know there is a trick where you can use dungeon boss room and kill all enemies item to activate the secret combos on another screen aside from the one you are in...but having horrible memory lapse...someone know how to do it?
kill all enemies trick --
In a nutshell:
1. place a "kill all enemies" item in a room where you want the trigger to be & then place a "trigger" enemy in that screen & then check the "boss room" enemy flag
2. in the room where you want the secret to be, place a "trigger" enemy & set the "enemies->secrets" screen flag & also set the "boss room" enemy flag for this room as well
3. both rooms must be in the same dmap or in different dmaps but with the same level #
Note that you will get the secret sfx in the destination room, however you can surpress this with the no secret sfx screen rule.