WWE SmackDown! vs. RAW 2008 Cheats

Costumes
Enter this code in the cheat codes option.

KellyKG12R: Kelly Kelly second outfit.
DXCOSTUME69K2: Unlocks HHH and HBK's DX attires.

Unlockable Characters
Go to 24/7 mode and access the WWE shop:

Bret Hart: Defeat Bret Hart in the Hall of Fame direct challenge mode, then you can buy him in the WWE Shop for $210,000
Mick Foley: Defeat Mick Foley in the Hall of Fame direct challenge mode, then you can buy him in the WWE shop for $210,000
Ravishing Rick Rude: Buy in the WWE Shop for $210,000
Rowdy Roddy Piper: Buy in the WWE Shop for $210,000
Stone Cold Steve Austin: In the Hall of Fame, select Stone Cold. Defeat him in a Submission Match using Bret Hart, then you can buy him in the WWE ship for $210,000
Terry Funk: Defeat Tommy Dreamer, Sabu, and Sandman in an ECW Extreme Rules 4-way mmatch using an superstar on "Legend" Difficulty. In WWE shop for $210,000
The Rock: Defeat The Rock as Stone Cold in "Legend" Difficulty, then you can buy him in the WWE shop for $210,000

Unlockable Arenas
Complete tasks in Hall of Fame Mode to unlock the Arenas:

December to Dismember Arena: Get 8 points in Hall of Fame Mode
ECW One Night Stand Arena: Get 7 points in Hall of Fame Mode
Great American Bash Arena: Get 10 points in Hall of Fame Mode
New Year's Revolution Arena: Get 9 points in Hall of Fame Mode
No Way Out Arena: Get 5 points in Hall of Fame Mode
Summerslam arena: Get 11 points in hall of fame mode
Vengeance Arena: Get 6 points in Hall of Fame Mode
Wrestlemania 23 Arena: Get 12 points in Hall of Fame mode