Select 2 player mode. On the character select screen, press Up, Down, Left, Up, Down, Right + A.
Samurai Shodown III: Play as Zankuro in 2-Player Mode
When selecting your character for a two-player game, with the cursor on Haohmaru, hold Start and move the cursor to each character in the following order:
With the cursor on Shizumaru, wait until the timer reaches 03 and then press A and B at the same time. You will have chosen Zankuro and will be able to use him for the next match only. If you win with Zankuro, you will be returned to the select screen to choose another character.
Samurai Shodown IV: Blood Mode
Hold down start, go to the Options menu, keep holding start and press A, B, C, and D on the Exit button.
Samurai Shodown IV: Die and start the next round with max POW
During a round press Left, Right, Diagonally Down and Right, and then Down and Start at the same time.
Samurai Shodown IV: Fight Weaponless
To choose to fight without your weapon, tap Start rapidly Three times during a fight. Your character will then set their weapon down.
Samurai Shodown IV: Suicide
Commit the ancient art of Sepuku during a game by pressing left, right, down-right, and down during a match.
Samurai Shodown V: Play as Poppy
Highlight Galford and press: right, left, right, left, left, right, right, left, left, right + any button.
Samurai Shodown: Different Costumes
Press D while a character is highlighted on the Character Selection screen.