Tony Hawk's Project 8 Cheats

Unlockable Characters
Open up the password screen in the options menu and enter the following code:

needaride: All decks except for the Inkblot deck and Gamestop deck will be unlocked and free.
yougotitall: All specials unlocked in the shop
drinkup: Full Air Stats
birdhouse: Inkblot deck
newshound: Skate as Anchorman
hohohosoi: Skate as Christian Hosoi
militarymen: Skate as Colonel and Security Guard
strangefellows: Skate as Dad and Skater Jam Kid
notmono: Skate as Jason Lee
mixitup: Skate as Kevin Staab
manineedadate: Skate as Mascot
wearelosers: Skate as Nerd and Bum
shescaresme: Skate as Pat the Realtor
themedia: Skate as Photo Girl and Filmer
enterandwin: Skate as the Grim Reaper
plus44: Skate as Travis Barker
badverybad: Skate as Twin
suckstobedead: Skate as Zombie Officer Dick
hatedandproud: Vans No Skool Gothic shoes

Glitch: How to play as Pro Skater in Career Mode
1. Go to career and go ahead City Park area.
2. There, go to Tutorial Warehouse. In front of the doors, there should pop up a sign where reads "(X) Enter Training" Then press [X].
3. Now you should be in the Tutorial Menu, now pick the Pro Skater you wish to play in Career.
4. Then select any tutorial.
5. Now when you are inside the warehouse, head to the doors where you came in. There between the traffic cone and doors, should appear a text "Exit Training (X)" Now press [X].
6. Now you are again at the City Park. But, as a Pro Skater.
7. Then you can go do goals or whatever you want to do.

Sure thing is that you cant change clothes when you're a Pro Skater. To return the player as normal character, select Edit Skater in Your Room. Then select Default Look.