|This page is rather stubbly and could use some expansion.|
Are you a bad enough dude to
Entering AAAC on the password screen activates a developer's tool.
During game play, press Start for one full second to enter the pause menu. You will see your X and Y co-ordinates in the upper left corner. Not sure what else it does yet.
When the AAAC password is entered, it sets a value of FFFF to RAM address FFF4B8. When you enter the pause menu, this is what the assembly code looks like:
00:7030 4A 78 TST.W ($F4B8) = Checking RAM address FFF4B8 to see if it's equal to zero. 00:7034 67 48 BEQ #$48 [00:707E] = If it's equal to zero, branch to ROM address $00707E.
Since the password set that RAM address to FFFF, it won't branch to $00707E. It will run the "developer's" routine, instead.
Here's a ROM patch that changes the conditional branch, so it will always run the "developer's" routine: At ROM address $007034, change the 6748 to 4E71. Alternatively, use the Game Genie code RF2A-A6VY.