Tony Hawk´s Proving Ground Hints

Select "Options" at the main menu, then enter one of the following case-sensitive codes at the cheats option to activate the corresponding cheat function. Using some codes will disable your listing in the online leaderboards.
Perfect Manual:
Enter STILLAINTFALLIN as a code.

Perfect Rail:
Enter AintFallin as a code.

Super Check:
Enter Booyah as a code.

Unlimited Focus:
Enter Myopic as a code.

Unlimited Slash Grind:
Enter SUPERSLASHIN as a code.

100% Branch Completion:
Enter FOREVERNAILED as a code.

No Bails:
Enter AINTFALLIN as a code.

Invisible man:
Enter TheMissing as a code. Note: This code cannot be used with the video editor.

Mini skater:
Enter TinyTater as a code. Note: This code cannot be used with the video editor.

No Board:
Enter MagicMan as a code. Note: This code cannot be used with the video editor.

FDR level:
Enter ThePrezPark as a code.

Lansdowne level:
Enter THELOCALPARK as a code.

Air And Space Museum level:
Enter TheIndoorPark as a code.

Play as Boneman:
Enter CRAZYBONEMAN as a code.

Play as Bosco:
Enter MoreMilk as a code.

Play as Cam:
Enter NotACamera as a code.

Play as Cooper:
Enter TheCoop as a code.

Play as Eddie X:
Enter Sketchy as a code.

Play as El Patinador:
Enter Piledriver as a code.

Play as Eric:
Enter Flyaway as a code.

Play as Mad Dog:
Enter Rabbies as a code.

Play as MCA:
Enter INTERGALACTIC as a code.

Play as Mel:
Enter NotADude as a code.

Play as Rube:
Enter LooksSmelly as a code.

Play as Shayne:
Enter Movers as a code.

Play as Spence:
Enter Dapper as a code.

Play as TV Producer:
Enter Shaker as a code.

All fun items:
Enter OverTheTop as a code.

All create-a-skater items:
Enter GiveMeStuff as a code.

All decks:
Enter LetsGoSkate as a code.

All game movies:
Enter WatchThis as a code.

All Lounge bling items:
Enter SweetStuff as a code.

All Lounge themes:
Enter LAIDBACKLOUNGE as a code.

All rigger pieces:
Enter IMGONNABUILD as a code.

All video editor effects:
Enter Trippy as a code.

All video editor overlays:
Enter PutEmOnTop as a code.

All specials available:
Enter LOTSOFTRICKS as a code.

Full stats:
Enter BeefedUp as a code.

50 extra skill points:
Enter NeedsHelp as a code.

This is a glitch that i found because i was bored..... and well it can get you more than 100mil points,train your charecters spin, or air, or whatnot but it can only be done on one level. Go to downtown baltimore and then skate your way up to the fountain. Get off your board and try to aim your sk8er a little bit behind one of the jets but where your feet are about to touch the jet.Get back on your board now. Do a PERFECTY strait jump by jumping and then holding backwards.If your charecter continuslly gets hit by the jet then your doing the trick right, but there is a few steps that must be followed carfully or else this has been a waste and youll get a NEGITIVE score.
Now: keep doing front-flips by holding up on the d-pad and on the analog, and wait for your score to get close to 10,000,000 (which might sound long,but really only takes 15-20 seconds) and then do a bunch of kickflips to add to the multiplier. BE VERY CARFUL NOT TO GET THE POINT TOTAL OVER 10,000,000 POINTS WHILE DOING THE FRONTFLIPS.... THIS WILL MAKE YOUR SCORE HAVE A NEGITIVE NUMERAL IN IT, WHICH DOSN'T HELP AT ALL.To get off hold up on the analog and continusly press the A button. When you land youll make an unimaginable high-score.
to train an air stat: just simply do what you would do to level the stat. EX: train spins, just spin one way, to train air, simply stay in the air.