Dr. Kiln:

Hold L and press B, C-Left, C-Up, C-Right, C-Down, and A.
Boogerman:

Hold L and press Up, Right, Down, Left, Right, Left at the character selection screen.
Random Characters:

Press L & R simultaneously at the select fighter screen for a random character.
CPU control:

Hold L and press A(5), C-Up, C-Down, C-Left, C-Left, B, A, C-Right at the character selection screen.
Secret Options:

1. Go to the Character Selection Screen
2. Hold L and press C-Up, C-Right, C-Left, C-Down, B, and A.
3. There will be a flash to confirm that the code was entered correctly.
4. Push the B Button to back up and then go into the Options Menu to access the Secret Options Menu.
Sumo Santa:

Hold L and press A, C-Down, C-Right, C-Up, C-Left, and B.
Programmers mode:

Hold L and press A, B, A, B, A, B, C-Left, C-Right, C-Up, C-Right, C-Left, C-Right at the character selection screen. This mode allows any character to be selected, and has an overhead view of each stage.
Alternate costume colors:

Press A for color scheme one or C-Down for color scheme two at the character selection screen, then press B to exit.
Same costume colors:

Press C-Up on either controller to select any fighter at the character selection screen. Have the other player highlight the same character and allow the timer to reach zero. Both fighters will be the same color during the match.
Stage select:

Select two player mode, then press C-Left or C-Right at the screen that displays the current stage.

300 Hit Combos
First perform any Combo. When your opponents life meter turns red, execute one of your characters Special Moves. Many hits will follow, and you can still do your characters Claytality!


Alternate Colors
To choose your clay fighters alternate color, press C-Down to select your character.


Level Select
In the two-player mode, when the versus screen comes up, press C-Right or C-Left to change the stage you will fight in.


Play as Dr. Kiln
To play as Dr. Kiln go to the player select screen and press and hold the L button, press B, left C, up C, right C, down C, A. There should be a flash on the screen.


Random Character Selection
At the character selection screen, hold the L and R buttons simultaneously and a random clay fighter will be chosen for you.


Taunts
To taunt your opponent, enter one of the codes below. (Depending on your character, of course.)

Bad Mr. Frosty: L, R + B simultaneously or L, R + A simultaneously.
Blob: L, R + A simultaneously.
Bonker: L, R + A simultaneously.
Dr. Kiln: L, R + A simultaneously.
Earthworm Jim: L, R + A simultaneously.
Houngan: L, R + B simultaneously or L, R + A simultaneously.
Icky Bod Clay: L, R + B simultaneously.
Kung Pow: L, R + A simultaneously.
Sumo Santa: L, R + A simultaneously.
Taffy: L, R + B simultaneously.
T. Hoppy: L, R + A simultaneously.


Secret Options
At the Character Select screen, hold L
and press C-Up, C-Right, C-Left, C-Down, B, A, A
. A flash of light will confirm the code.

Then go to the option menu and you will see a new menu for Secret Options. Now you can choose itty bitty/massive bodies, high/low voices, background select, and a few other options.


Play as Sumo Santa
At the Character Select screen, hold L and press A, C-Down, C-Right, C-Up, C-Left, B.


Play as Boogerman
To play as Boogerman, go to the Character Select screen, then hold L and press Up, Right, Down, Left, Right, Left on the d-pad (not the analog stick.)


Sumo Santas Moves
back,back,forward,left c = kringle crush

down,down,back,top c = cain attack

down,up,top c = cain pain

down,up,right c = flab o lanch

down,forward and left c = belly launcher

forward,right c = throw (when close)