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Playstation 2 - King of Fighters XI cheats

Unlock all Characters:

Adelheid - Beat him in arcade mode when he challenges you
Ex Kyo Kusanagi - Finish Challenge 30 
Gai - Beat him in arcade mode when he challenges you
Geese Howard - Finish Challenge 40 
Hotaru Futaba - Finish Challenge 15 
Jyazu - Beat him in arcade mode when he challenges you
Magaki - Finish Challenge 6 
Mai Shiranui - Finish Challenge 20 
Mr. Big - Finish Challenge 35 
Robert Garcia - Finish Challenge 10 
Shion - Beat her in arcade mode. She is the fight befoer Magaki. 
Sho - Beat him in arcade mode when he challenges you. 
Silber - Beat him in arcade mode when he challenges you. 
Tung Fu Rue - Finish Challenge 25 

Unlock all characters, artworks and endings:
Finish all challenges in Challenge mode