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Bonus rounds:
Insert any non-Sonic Genesis cartridge into the Sonic
And Knuckles cartridge. Hold A + B + C
and press Start when the "No Way" message is
displayed.
Level select:
Insert the Sonic The Hedgehog 2 cartridge into the
Sonic And Knuckles cartridge. Press Up(3), Down(3),
Left, Right, Left, Right at the title
screen. A sound will confirm correct code entry. Press A
+ Start to display the level selection screen. This code
will also all rings to be kept if your character is hit.
Debug mode:
Insert the Sonic The Hedgehog 2 cartridge into the Sonic
And Knuckles cartridge. Play songs 1, 9, 9, 4, 1, 0, 1, 8
in order at the level selection screen. Then, select any level,
hold A, and press Start. Screen coordinates will
appear instead of a score and the number of objects displayed
will appear instead of the time remaining. Use one of the following
controller actions to enable the corresponding debug code. Note:
This code may only be enabled on the first version of the game.
Object transformation
Press B during game play to change Sonic into a game
object. Press A to change into a new object. Press C
to place an object on the screen. Press B again to revert
back to Sonic. Note: The type of object that may be selectable
will vary from level to level.
Invincibility
Sonic is, by default, invincible in debug mode.
Slow motion
Pause game play and hold B.
Restart
Pause game play and press A.
Frame advance
Pause game play and press C.
Sound test:
Press A(2), B, A(2), B(3), A(2),
B, C at the title screen to access the sound test
for Zone 1. Press A(2), B(2), C(2), Up,
Down, Left, Right, A, C, B,
A(7) at the title screen to access the sound test for Zone
2. Hold Y and press Up, Left, Start(2)
for the last sound test.
Extra points:
Jump and hit the end of act marker. 100 points are awarded
every time the marker is hit.
*Alternate level select:
*Insert the Sonic The Hedgehog
3 cartridge into the Sonic And Knuckles cartridge.
Quickly press Up(2), Down(2), Up(4), after
the Sega logo fades and Sonic starts to appear, and before the
screen flashes white.
*Although posted as a valid code
on other web sites, it does not function in the retail version
of the game.
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