Doraemon (NES)

Doraemon
Developer: Hudson Soft Publisher: Hudson Soft Platform: NES Released in JP: December 12, 1986 This game has hidden developer credits. This game has hidden development-related text. This game has debugging material. This game has a hidden level select.

One of many, many games based on the Doraemon franchise.

Hidden Text

The following text is found in the ROM at 0x1028D.

DORAEMON WORLD3 
WRITTEN BY KIKU 
VER1.9 86/10/31 

Masaaki Kikuta is credited as a programmer in the game.

Also, immediately after the staff roll data, at 0x1ED4E some ASCII art with "HUDSON SOFT" and "XANADU COMING SOON" can be found.

  H      H      
  H      H      
  HHHHHHHH      
  H      H      
  H      H      
                
  U      U      
  U      U      
  U      U      
  U      U      
   UUUUUU       
                
  DDDD          
  D   DD        
  D     D       
  D     D       
  D   DD        
  DDDD          
                
   SSSS         
  S             
  S             
   SSSS         
       S        
  S    S        
   SSSS         
                
   SSSS         
  S    S        
  S    S        
  S    S        
  S    S        
   SSSS         
                
  N    N        
  NN   N        
  N N  N        
  N  N N        
  N   NN        
                
   SSSS         
  S             
  S             
   SSSS         
       S        
  S    S        
   SSSS         
                
   SSSS         
  S    S        
  S    S        
  S    S        
  S    S        
   SSSS         
                
  FFFFFF        
  F             
  FFFFF         
  F             
  F             
                
 TTTTTTT        
    T           
    T           
    T           
    T           
                
                
                
                
                
    XANADU      
  COMING SOON   

Level Select

At the title screen on controller 1 press Select a number of times corresponding to the desired world (1 time - World 2, 2 times - World 3), then hold A + B and press Start. If you do not press Select and just hold A + B before Start, World 1 will be played immediately without intro.

Debug mode and Easter egg

This only works for World 3. Before the World number screen appears hold A + B + Select + Up + Left on controller 1 and A + B + Down + Right on controller 2 at the same time. This will enable the debug flag. Now during the game, you can use the D-Pad buttons on controller 2 to jump to the next room in corresponding direction. Press A + B on controller 2 to see the Easter egg screen featuring the character Dorami and "KiKu", a reference to the game's programmer. After this screen is displayed, the game will return to the title screen.

The World warp cheats can also be used to quickly access World 3. Instead of A + B at the title screen, press the complete combination of buttons mentioned above.