Ranma ½: Hard Battle

Configuration mode:
Start match and finish the fight. Hold R + X + A at the continue screen until the next match starts. The configuration mode screen will appear.

Hidden options mode:
Start a one player game, and press X + A + L when the fighter's names are displayed.

Fight against the CPU in Duel and Team modes:
Hold L + R on the character selection screen to control the other player's selection. Hold L + R and press Y to select your opponent's character. That character will be CPU controlled at the current difficulty setting.

Bosses:
Highlight the "Story Mode" option, then hold L + R and press Start.

Fight with Happy and Colon:
Press Select + Start + L + R to get a secret level and be able to fight with Happy and Colon.
Information in this section was contributed by DragonRoy12.

Debug mode:
Hold L + R and press Start at the title screen. Continue to hold L + R until the debug options appear. Matches may now be set up using any character against a player or the CPU. Note: The CPU can not fight as Colon or Happy. Another option allows character strength to be adjusted. Press Select to change the background. Press Start to begin a match with the current settings.

Change character:
Hold L + R and press Left or Right at the character selection screen to select any character except for Happy or Colon.

Fight as same character:
Select the same character, then hold L + R on controller one while pressing any button to start the match.

Additional difficulty levels:
Press L, R, Select at the options screen. Two more difficulty levels will appear in red text.

View cinematics:
Press Select, X, Up, Left, Down, Right, Up at the game mode selection screen. The names of the character will appear at the top to confirm correct code entry. Select them to see all their cinematics.

Fight as Pantyhose:
Successfully complete the game to unlock the human and bull beast form of Pantyhose in single player mode.

Character adjust:
After choosing a character, hold R + X + A until a character configuration screen appears.

Alternate ending sequence:
In the Japanese version, successfully complete the game under the Hard difficulty. The ending will now feature the transformed characters.