The King of Fighters XI

Cheats

Unlockables
How to choose who challenges you in stage 4.

On stage 4 in arcade mode, you will get challenged by a secret character. The character that challenges you is determined by how many LDM you land on your opponent before that, you will get at most 2 LDM usage per stage, so to fight Jyazu or Silber, you must land all 6. If you meet the requirement for Jyazu and Silber, the one who challenges you will be random between these 2. This will help you unlock these character faster.
Unlockable              How to Unlock
Jyazu                   Land at least 6 LDM, no character may die.
Sho Hayate              Land at least 3 LDM, no character may die.
Silber                  Land at least 6 LDM, no character may die.
To fight Adelheid       Fail any of the requirements.
To fight Gai            Land at least 1 LDM.


How to unlock all the characters.

Here's how to unlock the secret characters.
Unlockable              How to Unlock
Adelheid                Defeat him in arcade mode when he challenges you.
Ex Kyo Kusanagi         Complete Challenge number 30
Gai                     Defeat him in arcade mode when he challenges you.
Geese Howard            Complete Challenge number 40
Geese Howard (alternate method)	Fail Mission over 20 times, pause in the middle of the match, and quit
Hotaru Futaba           Complete Challenge number 15
Jyazu                   Defeat him in arcade mode when he challenges you.
Magaki                  Complete Challenge number 6
Mai Shiranui            Complete Challenge number 20
Mr. Big                 Complete Challenge number 35
Robert Garcia           Complete Challenge number 10
Shion                   Defeat her in arcade mode. She is the fight befoer Magaki.
Shion (alternate method)Complete Mission 5
Sho                     Defeat him in arcade mode when he challenges you.
Silber                  Defeat him in arcade mode when he challenges you.
Tung Fu Rue             Complete Challenge number 25