OK, this is a probably been pointed out already, but, it's true nonsense, to me at least:
Originally posted by ROM Map
02A2E $00:A82E GFX File loaded for "MARIO START!," "GAME OVER," etc.
Now now. Change the value to FF (that's what I did), and go to a level.
There will be a MARIO/LUIGI START! message with garbled GFX. Makes sense. Then, the screen flashes yellow for not even a split second, and you appear in a random (?) level. When I entered Yoshi Island 2, I was either greeted by a castle entrance and then the level, or the red switch palace.
Originally posted by me
Then, I beat Yoshi's Island 1, which became a red switch palace.
The event of the path unrevealing didn't occur, and I got to the Yellow Switch palace. The game didn't ask me to save or not.
When I entered it, I was sent to level 1.
Once beated, some event occured (I couldn't see it tough), and I could easily travel between Yoshi's Island 1 and the Palace, even tough the event for the path never occured.
I decided to go back to Yoshi's Island 2, and the game crashed.
Or did it? The Mario start message came up very late with different graphics, and then the game began to play the boss music with random SFX in the Bg.
Note that it is the "MARIO START" message that causes this, since Yoshi's house enters normally.
Okay, I don't know if this is the right thread, or if this has been known before, but at least, I find it weird how GFX can control level entries somehow.
Exiting a level by a pipe works fine too, since it doesn't show up the "MARIO START" message.
Now, what does the game over do? The game just plays a black screen with the game over music, and then freezes without doing crazy stuff.
...for me, that sure was odd.
Anyway, I just began HEX Editing, so, bear with me if I said something already known. hurrr