Get a 'Sick' rating in the bonus level 'Downhill' by completing the 10 classic mode objectives and you'll and get the message 'Sponsor Gear Unlocked'. The Shaba Collector's deck is then near the bottom of the list in the skateshop.

At the Cheats menu in Options enter the following passwords to unlock the corresponding effect.

Unlock Full Stats:
Allthebest

Unlock Perfect Manual:
Frontandback

Always Special:
Jammypack

Unlock Perfect Rail:
Balancegalore

Unlock Unlimited Focus:
Shellshock

Unlock Travis Barker:
Plus44

Unlock Inkblot Deck:
Birdhouse

Unlock Jason Lee:
Notmono

Unlock Kevin Staab:
Mixitup

Unlock Mascot:
Manineedadate

Unlock Nerd:
Wearelosers

Unlock Anchorman:
Newshound

Unlock Big Realtor:
Shescaresme

Unlock Bum:
Enterandwin

Unlock Twin:
Badverybad

Unlock Zombie:
Suckstobedead

Unlock Christian Hosoi:
Hohohosoi

Unlock Colonel and Security Guard:
Militarymen

Unlock Dad and Skater Jam Kid:
Strangefellows

Unlock Photography Girl and Filmer:
Themedia

Unlock Skinny Real Estate Agent:
Sellsellsell

Specials unlocked and in 'Players Special List' and set as owned in Skate shop:
Yougotitall a;;

ALL Decks unlocked and free except for Inkblot Deck and Gamestop Deck:
Needaride