King of Fighters XI"
Key: 56 8C 3F 13 25 0E 3F 28 E8 95 E9 5B E6 A7 A3 94 24 7B 0C FE 
Elf: SLUS_216.87 

Day1: CB7+

M CBv6+/XPv4+/GSv3+
90109258 0C04243E

M CBv1-5 / XPv1-2 (For AR Max converting GameID: 1458 - Region: USA)
F0115F60 00115F63

M AR2v2 / GS2v2 (including swap coder)
0E3C7DF2 1456E7A5
F0115F60 00115F63

PAL2NTSC (The game does runs in PAL for like 1 sec during one of logos)
20100260 24120002

Shrink Screen (So I could see the Gauges)
008B6DC0 00000001

Freeze Timer
008A5D28 00000010

Disable AI
008A5D29 00000080

Unlock Extra Characters
108AA7C0 0000FFFF

100% Complete Status
408AA7D0 00140001
FFFFFFFF 00000000

Player 1 Codes:
Infinite Health Character 1
208A97E4 00700070

Infinite Health Character 2
208A9804 00700070

Infinite Health Character 3
208A9824 00700070

Max Power Gauge
108A96C8 000003E7

Max Skill Gauge
108A96CC 000003E7

Player 2 Codes:
1 Hit Kill Character 1
D08A9A2C 00000070
208A9A2C 00000000

1 Hit Kill Character 2
D08A9A4C 00000070
208A9A4C 00000000

1 Hit Kill Character 3
D08A9A6C 00000070
208A9A6C 00000000

No Power Gauge
108A9910 00000000

No Skill Gauge
108A9914 00000000

Character Mod Codes
Player 1 Character 1 Mod
008A97E0 000000??

Player 1 Character 2 Mod
008A9800 000000??

Player 1 Character 3 Mod
008A9820 000000??

Player 2 Character 1 Mod
008A9A28 000000??

Player 2 Character 2 Mod
008A9A48 000000??

Player 2 Character 3 Mod
008A9A68 000000??

00 = Ash
01 = Oswald
02 = Shen
03 = Elisabeth
04 = Dulon
05 = Benimaru
06 = Terry
07 = Kim
08 = Duck
09 = Ryo
0A = Yuri 
0B = King 
0C = Jenet 
0D = Gato
0E = Griffon
0F = Ralf 
10 = Clark
11 = Whip
12 = Athena
13 = Kensou
14 = Momoko
15 = Vanessa
16 = Mary
17 = Ramon
18 = Malin
19 = Kasumi
1A = Eiji
1B = K' 
1C = Kula
1D = Maxima
1E = Kyo
1F = Iori
20 = Shingo
21 = Gai
22 = Hayate
23 = Adelheid
24 = Silber
25 = Jazu
26 = Shion
27 = Magaki
28 = Random Team
29 = Mai
2A = Robert
2B = MR.BIG
2C = Geese
2D = Hotaru
2E = Tung
2F = EX Kyo

Credit: Lee4