I was on my third run of Castlevania III and finally beat the Sunken City, Thus accomplishing my goal of all levels on a single run (Not a speed Run mind you, but a Tool-assisted run of all the levels in three sweeps) I'm curios to see if anyone else has accomplished this and encountered the same glitch?
Upon starting the Abandoned mines I found that the enemies had been removed, and my whip could not destroy candles or fire bowls. Jumping off of ledges causes the player to loop threw the screen endlessly and you can eventually ease yourself back onto the platform with the Left or Right D-Pad. Time Runs out, Still nothing happens Weird. Weirder still, there seems to be an invisible wall just left of the first set of crumbling blocks in stage 7-02 which prevents you from continuing further into the stage (An error with scrolling code perhaps? Since the previous 2 Areas did not scroll.)
There is one other trigger I could think of, If you capture the orb in a instant-death situation, Like on the flooded bricks in the boss chamber of the Sunken City perhaps this has a lasting effect on the game play? While I have no intention of playing thought all the levels again, I might explore the possibility of this scenario playing out.