The Lion King: Adventures at Pride Rock

The Lion King: Adventures at Pride Rock
Also known as: O Rei Leao: As Aventuras de Simba (BR) Developer: Realtime Associates Publishers: Sega (US), Tec Toy (BR) Platform: Sega Pico Released in US: May 1995 Released in BR: 1995 This game has a hidden developer message. This game has a prototype article

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An educational game based on the Disney movie.

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Prototype Info

Easter Egg

A button code can be input during the Sega Pico logo screen, where it's checked against 9 byte values starting at address 00014200. If correct, a third bird will dash through the Sega Pico logo screen, some title screen graphics are flipped upside-down, and a message from lead programmer Thomas Peng is shown after the credits text.

In particular, this code also requires bits 5 and 6 to be set in the I/O address 00800003. It's unknown what input these correspond to, how they are activated in hardware (presumably by default, since they are required to show the credits text), and no emulator supports setting these bits without patching. For example, PicoDrive can be patched to allow setting these bits with key z.

The following table contains the input sequence for this code. It assumes a button named Set bits 5 and 6 is pressed and released at the beginning, but not held down. All remaining buttons must be held down in the correct order.

Key	Input Value	Code Value
Set bits 5 and 6	60h
Down	(60h)+02h	62h
Down+Left	(60h)+02h+04h	66h
Down+Left+Up	(60h)+02h+04h+01h	67h
Down+Left+Up+Right	(60h)+02h+04h+01h+08h	6Fh
Down+Left+Up+Right+Pen Button	(60h)+02h+04h+01h+08h+80h	EFh
Red Button+Pen Button	(60h)+10h+80h	F0h
Red Button+Pen Button+Down+Left+Up+Right	(60h)+10h+80h+02h+04h+01h+08h	FFh
Down+Up	(60h)+02h+01h	63h
Pen Button+Left+Right	(60h)+80h+04h+08h	ECh

Alternatively, the cheat can be activated by applying the following patch (US version):

0001425c = 6018 ; Unconditional branch for cheat enabled
00014650 = 600a ; Unconditional branch for I/O bits 5 and 6
000146a8 = 600a ; Same as 00014650

(Source: QUFB)

Message text:

 HEY YOU FOUND 
   THE CHEAT   
 
HOPE YOU HAD AS
MUCH FUN PLAYING
  AS I HAD IN 
 PROGRAMMING IT 
 
WITH SOME SORROW
 I BID FAREWELL
TO THE SEGA PICO
 
    AND NOW
 
  BRING ON THE  
     SATURN    
 
      YES      
 
  THOMAS SAYS  
     HI TO     
 
  MY PARENTS 
   Y C PENG  
      AND    
  IRENE PENG 
 
  ROGER PENG 
 
  SHIH HSIN  
     PENG    
 
 LILLY AMPAI
   REWRUJA  
  AMY K LEE 
 
 DARIUS KUO 
 
  BILL LIN  
 
 RICK CHEN 
 
 PETER JAN 
 
WILLIAM LIU