Most of this info is credited to Jimbo 1 of www.gamefaqs.com unless otherwise noted

-To climb the smackdown fist, go all the way to the left of the stage and climb the crack.

-To climb the KOTR, climb the legs of the chair.

-Climb the metal things for rebellion. Those are only 3 titantrons that you can climb

-To put opponent through a table with an arial move, you must grab them with the table by pressing O.

-Press L1+L2 during your finisher to get both camera affects.(camera affect(s) only works in matches with 2 wrestlers.)

-To do chair finishers,grab a chair,press down X, then press L1.

-You cannot use Shawn Michaels in season. Except for a codebreaker code, I'm not sure if it's real or not because I don't have a codebreaker.

-Get 100 kos in slobberknocker to get the Diva video

-To use alternate attires, you must first unlock them in season. Then after you set the amount of smackdowns for your character, a menu with the attires you have for that character will appear.

-You can do Walls of Jericho and Swanton bomb on the ladder as a ladder move. All you need is to have that move as your second special. Press any direction plus O when opponent is groogy on ladder.(only ladder moves, Swanton bomb,Walls of Jericho,Superplex,Toss,punch)

-Unlock Hogan in season to unlock nWo video 1 and his nWo attire.

-Yes D-von has his Dudley attire.

-No 2 player season.

-Copy opponent's finisher by pressing L2+L1(you need 2 smackdown icons)

-Copying arial finishers will only work off turnbuckles.

-Kane doesn't have new attire.

-Different between Brock Lesnar's attires are the design on his undewear.

-Ref's finisher is standing crossface.

-Hardys,Stacy Keibler,Tajiri,Maven don't have correct/current music

-Press L2 after match when bell is ringing to celebrate. X or O to attack.

-Climb apron by running towards it and pressing square.

-No angle slam off top rope.

-Reverse these moves with square and then press L1 right away to go to your own special.
Chris Jericho : Front Dropkick --> Walls of Jericho
Chris Benoit : Clothesline --> Crippler Crossface
The Rock : Clothesline --> Rock Bottom
Kurt Angle : Toe Kick --> Angle Lock
Ric Flair : Toe Kick --> Dragon Screw
Steve Austin : Toe Kick --> Turnaround & Stunner
Rob Van Dam : Chair Attack --> Van Daminator
Lance Storm : Clothesline --> Superkick
credit:DARK ANDY
(not sure if Walls of Jericho,Van Daminator and Stunner works cause I couldn't do it.)

-Throw tables onto each other, than climb it and set it to stack tables.

-No you can't open the door in a cage match.

-These are the moves you can do through the table while standing next to it. This part ISN'T mine. It's dol96's and madmanmike and some other guys.
-Full Nelson Slam (Not Test's)
-Super Powerbomb 1
-Fireman's Carry To Slam
-Body Press Drop FW
-The Last Ride
-Undertaker Chokeslam 2
-Chokeslam 3
-Belly to Belly
-Angle Slam 2
-Cross Powerbomb
-Electric Chair Drop
-Sambo Suplex
-Backdrop 1
-Benoit German Suplex
-Release German Suplex
-Tazzplex
-Multiple German Suplex
-Super Powerbomb 2
-Razor's Edge
-The Alley-Oop
-Judo Hip toss 1 (it's the one you had to unlock)
-STO 1
-Spiral Bomb
-Running Powerbomb w/pin (If you have a tall character this go through the table almost everytime. But if you have a short character it will never work...ever)
-Fireman's Carry Slam(the RVD rolling one)

These are gs music mod codes

Main DEEF4C5EBC??????
Exibition DEEF4CEEBC??????
Create DEEF437EBC??????
Season DEEF428EBC??????
Ending Wave DEEF421EBC??????
Match BGM 1 DEEF41AEBC??????
Match BGM 2 DEEF413EBC??????
Match BGM 3 DEEF404EBC??????
Match BGM 4 DEEF40DEBC??????
Match BGM 5 DEEF476EBC??????
Match BGM 6 DEEF46FEBC??????
Match BGM 7 DEEF460EBC??????
PPV Image 1 DEEF459EBC??????
PPV Image 2 DEEF452EBC??????
PPV Image 3 DEEF44BEBC??????
Edit Original 1 DEEF44CEBC??????
Edit Original 2 DEEF3B5EBC??????
Edit Original 3 DEEF3BEEBC??????
Edit Original 4 DEEF3A7EBC??????
Edit Original 5 DEEF398EBC???????
Edit Original 6 DEEF391EBC???????
Edit Original 7 DEEF38AEBC??????
Edit Original 8 DEEF383EBC??????
Edit Original 9 2A7BED5C00??????
Edit Original 10 DEEF3FDEBC??????
Edit Original 11 DEEF3E6EBC???????
Edit Original 12 DEEF3DFEBC????????
Edit Original 13 DEEF3D0EBC??????
Edit Original 14 DEEF3C9EBC???????
Edit Original 15 DEEF3C2EBC?????
Edit Original 16 DEEF33BEBC???????
Edit Original 17 DEEF33CEBC????????
Edit Original 18 DEEF325EBC??????
Raw OP DEEF364EBC??????
Raw Season DEEF36DEBC??????
SmackDown OP DEEF34FEBC??????
Christian2 DEEF2B2EBC??????
Smack Season DEEF2ABEBC??????
WWE TV Title DEEF2ACEBC??????
Ric Flair DEEF29EEBC??????
The Rock DEEF287EBC??????
Season Smack 1 DEEF01DEBC??????
Season Smack 2 DEEF006EBC??????
Season RAW 1 DEEF07FEBC??????
Season RAW 2 DEEF070EBC??????

B1E793 - Ending wave (Real American)
B88947 - Create
B89500 - Season
B9A1C9 - Match BGM 1
B9B6A0 - Match BGM 2
B9CA3A - Match BGM 3
B9DC2E - Match BGM 4
B9EEC3 - Match BGM 5
B901CD - Match BGM 6
B9127F - Match BGM 7
B92448 - PPV image 1
B928B5 - PPV image 2
B92AF3 - PPV image 3
B92D2D - Edit Original 1
B93015 - Edit Original 2
B933F4 - Edit Original 3
B937BF - Edit Original 4
B93AA9 - Edit Original 5
B93D9E - Edit Original 6
B94087 - Edit Original 7
B9439B - Edit Original 8
B94581 - Edit Original 9
B94878 - Edit Original 10
B94B71 - Edit Original 11
B94FF3 - Edit Original 12
B95207 - Edit Original 13
B956A4 - Edit Original 14
B9590D - Edit Original 15
B95C4F - Rob Van Dam
B96850 - Booker T.
B96E15 - Edit Original 16
B97192 - Edit Original 17
B9767A - Edit Original 18
B97A34 - Raw OP
B96C83 - Raw Season
B96C58 - SmackDown OP
BAA171 - Christian2
BAA737 - Smack Season
BAA862 - WWE TV title
BAAA0B - Ric Flair
BAB0D0 - The Rock
BABB5A - Steve Austin
BAC11F - Triple H
BACDA9 - Undertaker
BAD833 - Kurt Angle
BAE4BD - Chris Jericho
BAEF47 - Kane
BAF50C - Chris Benoit
BAFBD1 - The Hardy Boyz
BA0187 - Stacy Keibler
BA0A90 - E&C
BA0F55- Christian1
BA151A - Lita
BA1BE0 - Bubba Ray Dudley
BA21A5 - D-Von
BA266A - William Regal
BA2C2F - Lance Storm
BA32F4 - Diamond Dallas Page
BA38B9 - Stephanie McMahon
BA3D7E - Vince McMahon
BA4343 - Bradshaw
BA4908- Test
BA4FCD - Big Show
BA5592 - Trish Stratus
BA5A57 - Tajiri
BA601C - Rikishi
BA66E1 - Ric Flair
BA6CA6 - Hollywood Hulk Hogan
BA71CC - nWo(Kevin Nash‘¼)
BA7791 - Rico
BA7C56 - Chuck

credit I think it's SSJBUU619 but if it's not, I'm sorry that I couldn't give credit to the person who submitted these codes.
Armageddon PPV rewards
Ric Flair's attire
Chuck's attire
Billy's attire
Armageddon arena
Winter Plaza area
Winter Times Square area

Backlash PPV rewards
The Rock's attire
Christian's attire
Create Parts 1
Backlash arena
Foam Hands A

Insurrextion PPV rewards
Jeff Hardy's attire
William Regal's attire
Moves 9
Create Parts 4
Insurrextion arena

Judgment Day PPV rewards
RVD's attire
Vince McMahon's attire
Eddie Guerrero's attire
Undertaker's attire
Create Parts 2
Judgment Day arena

King Of The Ring PPV rewards
Kurt Angle's attire
Edge's attire
Moves 2
Create Parts 8
King of the Ring arena
Plaza B backstage area

No Mercy PPV rewards
Shawn Michaels' attire
Stephanie McMahon's attire
Rikishi's attire
D-Von's attire
Molly Holly's attire
No Mercy arena

No Way Out PPV rewards
Kevin Nash (for Season Mode)
X-Pac (for Season Mode)
Big Show's attire
The Big Valbowski's attire
Moves 5
No Way Out arena

Rebellion PPV rewards
Chris Jericho's attire
Stacy Keibler's attire
Brock Lesnar's attire
Moves 10
Rebellion arena

Royal Rumble PPV rewards
Triple H's attire
Steve Austin's attire
Bubba Ray's attire
Create Parts 6
Royal Rumble arena
WWE Superstar Special Movie

SummerSlam PPV rewards
Booker T's attire
Torrie Wilson's attire
Moves 4
Moves 6
Create Parts 9
SummerSlam arena

Survivor Series PPV rewards
Matt Hardy's attire
Hardcore Holly's attire
Moves 7
Moves 8
30 Ability Points
Survivor Series arena

Undisputed Championship rewards
Special RVD FMV sequence
SmackDown SYM Special FMV sequence

Unforgiven PPV rewards
Chris Benoit's attire
Trish Stratus's attire
Moves 3
Create Parts 5
Unforgiven arena
Foam Hands B

Vengeance PPV rewards
Lance Storm's attire
Raven's attire
Billy Kidman's attire
Create Parts 3
Vengeance arena A
Vengeance arena B

WrestleMania PPV rewards
Hulk Hogan (for Season Mode)
Faarooq's attire
Bradshaw's attire
Moves 1
Create Parts 7
WrestleMania X8 arena.