Cheats42.net

Cheat mode:
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At the main menu, select "Options", "Cheat Codes", then enter one of the
following case-sensitive codes to activate the corresponding cheat function.
Note: Some European and Australian versions of the game do not have the "Cheat
Codes" option.
Kelly Kelly's second costume:
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Enter "KellyKG12R" as a case-sensitive code to unlock Kelly Kelly's second
costume.
Triple H and HBK's DX attire:
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Enter "DXCostume69K2" as a case-sensitive code to unlock Triple H and HBK's DX
attire.
Bonuses:
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Successfully complete the indicated task in Main Event mode to unlock the
corresponding arena, wrestler, or costume:
Armageddon: Compete for a title while playing in the SmackDown brand.
Backlash: Compete for a title while playing in the RAW brand.
December To Dismember: Compete for a title while playing in the ECW brand.
ECW One Night Stand: Compete for a title while playing in the ECW brand.
Judgement Day: Compete for a title while playing in the SmackDown brand.
New Years Revolution: Compete for a title while playing in the RAW brand.
No Mercy: Compete for a title while playing in the SmackDown brand.
No Way Out: Compete for a title while playing in the SmackDown brand.
Royal Rumble: Compete for a title while playing in any brand.
Summer Slam: Compete for a title while playing in the SmackDown brand.
Survivor Series: Compete for a title while playing in the RAW brand.
Unforgiven: Compete for a title while playing in the RAW brand.
Vengeance: Compete for a title while playing in the RAW brand.
WrestleMania: Compete for a title while playing in the RAW brand.
JBL: Reach the "Main Eventer" rank for the SmackDown brand.
Roddy Piper: Reach the "Showstealer" rank with any wrestler.
Sabu: Reach the "Showstealer" rank with any wrestler.
Shane McMahon: Reach the "Main Eventer" rank for the Raw brand.
Tommy Dreamer: Reach the "Showstealer" rank with any wrestler.
Vince McMahon: Reach the "Main Eventer" rank for the ECW brand.
Vince McMahon (bald): Win the ECW World Championship.
Shawn Michaels DX costume: Reach the "Main Event" rank with Shawn Michaels.
Triple H DX costume: Reach the "Main Event" rank with Triple H.