Unlock hidden characters:
A.ku.mu.: Earn a "Jet" ranking at Fortified Residential Zone. 
Beat: Defeat him in a street race. 
Boogie: She can be found at Kibogaoka Hill. 
Clutch: Follow DJ Professor K's instructions. 
Combo: Successfully complete his challenges. 
Cube: Defeat the Noise Tanks At Sky-Dinosaurian Square, then go to the bottom 
of the Sewage Facility and defeat Cube in the City Rush. 

Doom Riders: Earn a "Jet" ranking at Dogenzaka Hill. 
Garam: Successfully complete his challenges. 
Goji Rokkaku: Earn a "Jet" ranking at Rokkaku-Dai Heights. 
Immortals: Earn a "Jet" ranking in Skyscraper District and Pharaoh Park. 
Jazz: Go to the future site of Rokkaku Expo Stadium. Defeat Jazz at City Rush 
Love Shockers: Earn a "Jet" ranking at Hikage Street. 
Noise Tank: Earn a "Jet" ranking at Highway Zero. 
NT-3000: Earn a "Jet" ranking at Sky-Dinosaurium Square. 
Poison Jam: Earn a "Jet" rank in a test run at the Tokyo Underground Sewage 
Facility and at the bottom of Sewage Facility. 

Potts: Earn a "Jet" rank at Kibogaoka Hill. 
Rapid 99: Earn a "Jet" rank at 99th Street. 
Rhyth: Go to the top of the Poison Jam warehouse in Rokkaku-dai Heights to find 
her the first time. Follow and find her two more times in the game. 

RoBoy: Earn a "Jet" rank at Chou Street. 
Soda: Defeat Soda in City Rush at Highway Zero. 
Zero Beat: Earn a "Jet" rank in a test run at Shibuya Terminal. 

Test Run option:
Successfully complete the game then talk to RoBoy to unlock the "Test Run" 
option. Earn "Jet" ranks to unlock the characters in test run mode.

First, find the cassette (gold with a red "?" on it) for the level you want to unlock 
test run on. Next, press Start and read GG-notebook. Clear all the graffiti and 
street challenges. For each one you clear, a new graffiti soul will appear and it will 
show you where it is located. Do all of those, then get the default graffiti souls (the 
ones that are there when you start the level). Note: Special events may happen in 
certain levels that you must complete as well as everything else.

All characters:
Successfully complete everything in the game under ten hours.

Hidden message:
Collect all the Graffiti Souls and look at the square that you select your pictures 
on. On SS there is "be a" S is "master" M is "of" L is "the" and XL is "streets". This 
creates the message "Be a Master of the Streets".

To find out what year the game is based in, go to the "Garage" center in the game. 
Go to the big stack of speakers in a pyramid by the basketball hoop. Move the 
Right Analog-stick for about one minute. You can now use it to look in first person 
mode. Look in a corner on a speaker. In bold white writing, you will see "INU-
2007".


Easy Jet Tech:
In each level there is a 500 point grind. For example, in any level with the green metal side walk guard gives you 500 points. If you do the back to front or Y grind combo over that same grind, you can easily get a Jet ranking.
Information in this section was contributed by XvDarkAssailantX. 

Hint: Easy win at Ballhog 2P:
Go against Poison Jam. Get the ball, then go into the second pipe. Turn around and throw the ball. Go into the middle of the pipe and wait. Poison Jam will just stand there.
Information in this section was contributed by SPUDDYDUDDY0089. 

At Future Site of Rokkao Expo location, go to the area where you wallride and jump onto the platforms. Then, go up to one of the levels and through the ball so it stays on the platform. Wait and the Noise Tanks will just stand there.
Information in this section was contributed by Budocudo. 

Hint: Restore health:
To restore your health to the maximum, go to "Garage". Your health automatically goes to full.
Information in this section was contributed by Lenya Minchenko. 

Hint: Defeating Beat:
When you have to race Beat in the street race, you will get to the point where you have to copy his exact moves, grind on the rail, break through the glass, jump on both rooftops, then jump off and finish the rest of the race. You will get at least around five corners from him but you will hear his roller skates. However, if you look on your map his dot will be far from where you are. Keep going, but do not take your time or he will "boost dash" and knock you down. 
Information in this section was contributed by Razor Blade. 

When racing Beat in a street race, just follow him around Dogenzaka Hill. Once you see stairs with a blue outline, do a Boot Dash. You will be in front of him. Go up the stairs and you will win. 
Information in this section was contributed by Waspinator2. 

Defeating Hayashi:
When you are in the battle where he is on top of the building on Chuo Street, an 
easier way to defeat him is to knock him off the edge of the building. 

Combo:
To get Combo, watch him. If this does not happen, go up to him and press R. First, 
grind down the ramp. When you get to the red thing, jump. Next keep grinding 
until you run into the huge crowd of people. Next. jump. Then, grind up the ramp. 
Next, jump onto the "escalator". Stop near the end. Combo will then join you.

Beat and YoYo:
Play as Beat then let him remain idle and watch him dance. Play as Yoyo and 
watch him dance. They both dance the same. 

Noise Tank and Roboy:
When you unlock the Test Run option, complete Rokkaku-Dai Heights on the 
graffiti, tech, and flag to unlock Noise Tank. Then, use him and talk to Roboy. 
When he says "What are you lookin' at?", do not press a button. Instead, watch 
them dance. They dance the same, revealing that Roboy is a Noise Tank prototype.

Earn a "Jet" ranking at Highway Zero to unlock Noise Tanks. When you get spray 
cans, he has 20 (same with Roboy) and they have the total life bar 100%. If you 
do tricks but get hit by a car, you will take a long time to die. Also, if any one hurts 
you in Tager's Tag, it takes a long time to die.

YoYo and NT3000:
Once you get a "Jet" ranking at Sky Dinosaurium Square, you will unlock NT3000. 
He looks like YoYo with the hood on. Once you have saved the game, play in 
versus mode on a team. On the same team, have one player choose YoYo and 
another player NT3000. Win any mission and watch them dance the same. The 
glitch is that NT3000 is the same as YoYo. If racing, be first as NT3000 after any 
lap and DJ Professor K will call him YoYo even though the scroll at the bottom says 
NT3000.

Gougi and Clutch:
After you get a "Jet" ranking from Rokaku-dai Heights, you will unlock Gougi 
Rokaku. Once you have saved the game, play in versys mode on a team. On the 
same team, have one person choose Gougi and another person choose Clutch. 
Win any mission and watch them dance the same.

Hikage Street: Easy Spray Cans:
As soon as you enter, go to the left and ramp the yellow cans. Instead of giving 
you one can, it gives you two. The more you go there, the more cans you can get. 
It is possible to get up to twenty cans. 

Rokkuku-dai Heights: Easy Spray Cans: 
Begin at the first save point. Grind up the rail. After getting off that rail, go up the 
telephone pole and grind across the telephone wire onto the rooftop. Next, jump 
down off of the rooftop and land on the other rail. Grind across that one. Once you 
get off and get to the point where there is a rail that looks like a chain-link fence 
with a mobile trailer, go through the mobile trailer. You will get about twenty Spray 
Cans and one Health Can. You will also be in another area that you can reach 
about five seconds more than this secret.

Avoid fall damage:
Do an air combo until you reach the ground.

Shuffle for longer boost:
The shuffle is the grind move where you press the Left Analog-stick Down. When 
you boost, you can use the shuffle to make it longer. You do this by shuffling at 
the end of the boost. You can also use it for going up objects. The shuffle is just 
like grinding, so you can use it to get up hills and other objects.

Halfpipe drop-in:
When grinding on the edge of a halfpipe, press the Left Analog-stick Down.