Hey Guys!
This could be interesting for you:



I found this through Ram Hacking with VisualBoyAdvance in
Mario vs Donkey Kong (U). I think this is a Debug Mode or maybe an unfinished ingame Editor for Mario vs Donkey Kong. It´s unfinished, because you can´t place every sprite and tile from an world, like the Brickmonster or the lava from Magma Mountain.
This Editor doesn´t work in all levels and if you change a secound time into this mode without returning into the level select the game sometimes crashes. In both Final Fights you aren´t able to place sprites because the game shows you following beta message:

Here is the trick to get into this Mode:
1. Enter a level or a boss fight.
2. Open the Memory viewer in VisualBoyAdvance (enable automatic update).
3. Use the go feature to jump to Offset 30009C4 in IRAM.
4. You should see a Byte which is in a normal level 0D.
5. Change it to 0B.
6. It doesn´t work in every level like 1-1 but in every world there are
levels where it works.
7. If it works you should be now a placeable tile.
Here are the controls of this mode:
D-pad: to move around
B button: remove tiles and sprites
A button: add tiles or sprites
L-R: change to next sprite/tile
select: change to next set of sprite/tiles
start: start level!
If you have problems with the timer you should
change this Ram adress:
3000B54 + 3000B55 Level Timer
Maybe someday will someone finish this in-Game editor.
I hope you enjoy it!
P.S: you can set Marios starting position if you remove mario
and add mario with the editor to the position where he should start.
This could be interesting for you:



I found this through Ram Hacking with VisualBoyAdvance in
Mario vs Donkey Kong (U). I think this is a Debug Mode or maybe an unfinished ingame Editor for Mario vs Donkey Kong. It´s unfinished, because you can´t place every sprite and tile from an world, like the Brickmonster or the lava from Magma Mountain.
This Editor doesn´t work in all levels and if you change a secound time into this mode without returning into the level select the game sometimes crashes. In both Final Fights you aren´t able to place sprites because the game shows you following beta message:

Here is the trick to get into this Mode:
1. Enter a level or a boss fight.
2. Open the Memory viewer in VisualBoyAdvance (enable automatic update).
3. Use the go feature to jump to Offset 30009C4 in IRAM.
4. You should see a Byte which is in a normal level 0D.
5. Change it to 0B.
6. It doesn´t work in every level like 1-1 but in every world there are
levels where it works.
7. If it works you should be now a placeable tile.
Here are the controls of this mode:
D-pad: to move around
B button: remove tiles and sprites
A button: add tiles or sprites
L-R: change to next sprite/tile
select: change to next set of sprite/tiles
start: start level!
If you have problems with the timer you should
change this Ram adress:
3000B54 + 3000B55 Level Timer
Maybe someday will someone finish this in-Game editor.
I hope you enjoy it!
P.S: you can set Marios starting position if you remove mario
and add mario with the editor to the position where he should start.