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King of Fighters - Maximum Impact (NTSC-U)
Languages Size CRC32 Region Serial
English 0K Unknown USA SLUS-20923
Master Codes
(M) Must Be On by Codejunkies
ARMax 
N9C9-NA6W-59YZ6
YZ1E-BX3R-JYKKA
Enable Code (Must Be On) by Code Master
Codebreaker v7+ 
B4336FA9 4DFEFB79
C876138F 1C3DAB94
B8668F0D 9051B17C
E78C2ACF 7C9B71D2
[M] Must Be On by MadCatz
Gameshark v3-4 / Xploder v4 
7600F860 00000000
7700019B 272C1955
980BE29C 78D04BED
[M] Must Be On by MadCatz
Gameshark v3-4 / Xploder v4 
980BE29C 78D04BED
Infinite Time by MadCatz
Gameshark v3-4 / Xploder v4 
760D8340 00000000
28731357 0CA57A4F
Infinite Time by MadCatz
Gameshark v3-4 / Xploder v4 
28731357 0CA57A4F
Sudden Death Mode by MadCatz
Gameshark v3-4 / Xploder v4 
76017B40 00000000
D8731357 0CA57A2A
187ABD0A 0CA57A56
D8731357 0CA57A2A
187AB364 0CA57A56
Sudden Death Mode by MadCatz
Gameshark v3-4 / Xploder v4 
D8731357 0CA57A2A
187ABD0A 0CA57A56
D8731357 0CA57A2A
187AB364 0CA57A56