Worms
For unlimmited ammo press xx sq xx sq xx sq

the information you have is incorrect it is press xsxsxsxs to get super weapons to deactivate press xsxsxsxs

Type XSS XSS XSS in the Weapons options menu and bananna bombs, sheep and mini gun will all become accessable

Plus a few more mysterious level codes for you...
33926 - 70345 - 80765 - 304768 - 4802043 - 7267896 - 37637177 - 43629833 - 223981979 - 903172603 - 6786876866 - 7373888390 - BRITISH - KIG IS COL - DOOM SUCKS - WORMS RULE
Boxing Ring
During gameplay, execute a fire punch or a dragonball. Then quickly hold Square and press R1, L1, Circle. If done correctly, one worm from each team will teleport to a boxing arena.
Infinite Banana Bombs
At the Weapons Options screen, press Down, Right, X, Square, Square, X, Square, Square, X, Square, Square. This code is not for use with the Special Weapons code (X + Square 8x).
Special Weapons
At the Weapons Select screen, press Square + X 8 times.
Suicide Mode
Pause gameplay and press X, X, X, X, Square, Square, Square, Square, X, X, X, X, Square, Square, Square, Square.
Landscape Codes
To enter a custom-generated landscape code, press X to clear the preset code when a landscape is being randomly generated at the beginning of a game:
Code
Landscape
00956
Desert Storm
29726
Low Bridge
46463
Martianscape
57805
Martianscape 2
70345
Lollipop
97155
Three's A Crowd
149147
Kill Smiley
208041
Alternate Jungle
326576
Crowded Alienscape
436642
Hell
4802043
A Bridge Too Far
7841228
Beach
7007230
Snow Joke
13410325
Life's A Beach
23418990
All Beached Up
39054687
Beach Weather
56439996
The Tide is High
62332782
Forestscape
77004498
Alienscape
99426730
Cliffs of Hell
203953110
Alien Bridge
223981979
Christmas Time
309072302
Jungle Island
635199159
Cliffs and Lake
733737544
Another Alienscape
742182075
Another Forestscape
954338916
Bless You
1508066876
Another Candyscape
3329407250
Snorkel Island
7373888390
Fires of Hell
8902118313
Jungle
CHEZZY
Hollow Mountain
Thorahird
Dig Carefully