Earthworm Jim 2 - Platform: Super Nintendo

Snott shield
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Press Up + X during game play. 

Level skip
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Pause game play and press Select, B, X, A(2), X, B, Select. 

Invincibility
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Pause game play and press A(2), X, A, Left, Right(2), Left. 

Extra life
----------
Pause game play and press [Left, Select, Right, Select] two times. 

Extra life, one shot
--------------------
Pause game play and press [Select, Left, Select, Right] two times. 
Note: This code may only be used once per game. 

Instant continue
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Pause game play and press Y, Select, Y, B, X, B, X, B. 

One continue
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Pause game play and press A, Select, A, B, X, Y, X, Y. 

Plasma gun
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Pause game play and press X(4), A(3) Select. 

3-shot gun
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Pause game play and press X(4), A(2), X, Select. 

Homing gun
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Pause game play and press X(4), A(2), B, Select. 

Bubble gun
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Pause game play and press X(4), A, B, A, Select. 

Nuke gun
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Pause game play and press X(4), A, B, X, Select. 

Maximum ammunition
------------------
Pause game play and press Select, X(6), Select. 

Maximum ammunition, one shot
----------------------------
Pause game play and press X(7), Select. 
Note: This code may only be used once per game. 

Bomb
----
Pause game play and press X(4), B(4). 

View map
--------
Pause game play and press Select(7), B. 

Energy
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Pause game play and press X, Select, X, B, X, Select, X, A. 

Extra meal worms
----------------
Pause game play and press [A, B], four times for 81 meal worms. 

Invisible soil
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Pause game play and press A(2), B, A(2), X, B, Select.