there arent cheats but there are weather things. i'll copy and post a faq i use. i didnt write it.
**********Kanjyo Inner Loop Route C1**********
#314 - Lightning
The day must be a multiple of 3.
Note: Another requirement has not been found yet, but some people (myself
included) have reported that he will cancel the battle.
#315 - White Panther
The day must be a multiple of 5. That's it.
#316 - Garage Door
The day must be a multiple of 7. You need the license plates of either 3-0
(Shinagawa), 3-1 (Adachi), or 3-2 (Nerima). To get this, press O at the car
change screen. Go to the next screen and you should see a big list. Start
at the top-left. This is 0-0. Go down 3 and right 0, 1, or 2 times. Lookat
the bottom of the screen. It should say either Shinagawa, Adachi, or
Nerima.
#317 - Speed Drinker
Defeat #323: Illusion B. Beat the Speed King.
#318 - Lonely Wolf
Defeat Lonely Survivor from Team Gesellschaft.
#319 - Steam Storm
You must be past or on day 180. You must drive a foreign luxury car. A good
car is the Viper (Type-VGTS). See section 2 on how to get a Viper.
#320 - Invincible Artist
He's parked at Yaesu (the little side-road that you normally don't go on.)
To get him to appear, you're going to need to do some math. There is an
example underneath this explanation, so follow along with the example. Take
a look at what day you're on. Take only the ones digit and tens digit (drop
the hundreds digit as it will not be a part of your calculations). Multiply
the tens digit and the ones digit of the remaining number. Now that you have
that particular number, take the ones digit from that number. See if this
number is a 2.
Example: Day 126:
Drop the 100s digit from 126 and you get 26. (Look at it like 1 "26".)
Multiply 2 x 6 = 12.
Take the ones digit from this number. (Look at it like 1 "2".)
The number you get is 2. This means that he will appear. He will not appear
if the final number is not a 2.
#321 - Lost Freak
The day must be a multiple of 7. Drive the car Type-W30. This is a C-class
car and is available at any time. This is an MRS Spyder. His car is maxed
out so be on your toes.
#322 - Bloody Mary
Defeat #321: Lost Freak. With Lost Freak off the streets, she can breathe
again and come out to play.

This is a good way to get the Viper early in
the game.
**********Kanjyo Outer Loop Route C1**********
#323 - Illusion B
The day must be a multiple of 3.
#324 - Caffeine Addict
The day must have the number 3 as a digit. Here are some examples: 300, 213,
135, 3, 43, etc.
#325 - Magazine Freak
You must be past or on day 30. No other requirements.
#326 - Machine of Inferno
The day must be a multiple of 10. Use a car with the drive-train of FF. A
good car is the Eclipse that Code F has. He's from Team Alpha. If you're
confused on where to find the drive-train, look on the right side of the
Garage screen.
#327 - Anguish Barbarian
He's parked at Yaesu (the little side-road that you normally don't go on.)
To get him to appear, you're going to need to do some math. There is an
example underneath this explanation, so follow along with the example. Take
a look at what day you're on. Take only the ones digit and tens digit (drop
the hundreds digit as it will not be a part of your calculations). Multiply
the tens digit and the ones digit of the remaining number. Now that you have
that particular number, take the ones digit from that number. See if this
number is a 4.
Example: Day 127:
Drop the 100s digit from 127 and you get 27. (Look at it like 1 "27".)
Multiply 2 x 7 = 14.
Take the ones digit from this number. (Look at it like 1 "4".)
The number you get is 4. This means that he will appear. He will not appear
if the final number is not a 4.
#328 - Waist Master
Own 6 cars at one time and you can race him.
#329 - Master Position
He comes out between 21:00 - 23:00. That's 9:00 P.M. and 11 P.M. Try
resetting your Playstation's clock. You must drive a foreign luxury car. A
good car is the Viper (Type-VGTS). See section 2 on how to get a Viper
#330 - Pretty Affair
The day must be a multiple of 7. You must beat the Speed King. You need the
license plate 4-3 (Shonan). To get this, press O at the car change screen.
Go to the next screen and you should see a big list. Start at the top-left.
This is 0-0. Go down 4 and right 3. Look at the bottom of the screen. It
should say Shonan.
#331 - Devil Driver
He comes out between 2:00 - 4:00. That's 2 A.M. and 4 A.M. Try resetting
your Playstation's clock. At your garage, push R2. Look at the Total
Distance. It must be above 1243 miles.
***********Shinkanjyo CCW (Counter-clockwise)**********
#332 - Street Gambler
Every digit in the day must match. Here are some examples: 11, 22, 333,
4444, 99, 88, etc. Try to beat him before day 100.
#333 - Green Wild
The day must be a multiple of 7. You need the license plate 9-1 (Naniwa).
To get this, press O at the car change screen. Go to the next screen and you
should see a big list. Start at the top-left. This is 0-0. Go down 9 and
right 1. Look at the bottom of the screen. It should say Naniwa.
#334 - Dark Desperado
Your car must have very few miles. My guess is that you must be below 26
miles. I raced him when I just hit mile 25.
#335 - Eternity
Get a million dollars in your pocket and you can race her.
#336 - Mosquito Lemon
Beat Red Shadow from Team RATT. In the American version, this is the only
requirement. I believe in Japan you have to drive a Mitsubishi. That could
be the A-class series of Lancers. They all start out with Type-C. They're
kinda small and a bit box-like. (Try getting your first car as type CE9A)
#337 - Fearful Princess
Get $100,000 in your pocket and you can racer her.
#338 - Dumb yet Smart
Get a 2 seat car and drive in front of him. He likes to be the challenger.
A good car is the Viper (Type-VGTS). You could beat him easily with a stock
Viper. To get him to appear, you're going to need to do some math. There is
an example underneath this explanation, so follow along with the example.
Take a look at what day you're on. Take only the ones digit and tens digit
(drop the hundreds digit as it will not be a part of your calculations).
Multiply the tens digit and the ones digit of the remaining number. Now that
you have that particular number, take the ones digit from that number. See
if this number is a 4.
Example: Day 127:
Drop the 100s digit from 127 and you get 27. (Look at it like 1 "27".)
Multiply 2 x 7 = 14.
Take the ones digit from this number. (Look at it like 1 "4".)
The number you get is 4. This means that he will appear. He will not appear
if the final number is not a 4.
#339 - Wild Heart
The day must be a multiple of 3. You must have at least 100 wins.
#340 - Road Master
Drive 3107 miles (use the mileage trick.) He should show up after you have
at least that many miles. Push R2 on the Garage screen to check your total
miles.
**********Shinkanjyo CW (Clock-wise)**********
#341 - Glamour Girl
Own 25 cars at one time and you can race her.
#342 - God Year
Get a car that has less than 124 miles on it. Unequip your muffler (level
N).
#343 - Raspberry Kiss
The day must be a multiple of 10.
#344 - Craft Man
The day must be a multiple of 7. Drive a completely black car. The primary
and secondary colors are to both be 0,0,0. Wheel color is irrelevant.
#345 - Cutie Pie
Get $300,000 in your pocket and you can race her.
#346 - Storm Screamer
Defeat Rain Master from Team Dry Cruise.
#347 - Uncrushable Alexander
Do the Autopilot Trick (see section 4) and get 1860 miles on your car. Race
her with THAT car. (Yes, it's a HER).
#348 - Silver Ruler
The day must have the number 3 as a digit. Here are some examples: 300, 213,
135, 3, 43, etc. You must drive a Mitsubishi. A good Mitsubishi car is a
Lancer. These cars are A class cars and their model numbers start out with
TYPE-C. They're kinda small and are a bit box-like. (Try getting your first
car as type CE9A.)
Thanks to j_dwarf and 7HE_DON for confirming the Mitsubishi requirement.
#349 - Night Wolf
He comes out between 1:00 - 3:00. That's 1 A.M. and 3 A.M. Try resetting
your Playstation's clock.
**********Wangan North Bound**********
#350 - Max Energy
He's parked at the Showajima Junction. It's sort of in the middle of Wangan.
Look for three dots on the course selection screen that are close together.
Take the bottom dot. To get him to appear, you're going to need to do some
math. There is an example underneath this explanation, so follow along with
the example. Take a look at what day you're on. Take only the ones digit
and tens digit (drop the hundreds digit as it will not be a part of your
calculations). Multiply the tens digit and the ones digit of the remaining
number. Now that you have that particular number, take the ones digit from
that number. See if this number is a 2.
Example: Day 226:
Drop the 100s digit from 226 and you get 26. (Look at it like 2 "26".)
Multiply 2 x 6 = 12.
Take the ones digit from this number. (Look at it like 1 "2".)
The number you get is 2. This means that he will appear. He will not appear
if the final number is not a 2.
#351 - Jet Skater
The day must be a multiple of 7. At your garage, push R2. Look at the Total
Distance. It must be above 1243 miles. Drive the RX-7 with the car type as
FD3RS. I heard that you car also use Late Night Cinderella's custom car.
#352 - Crying Baby
The day must be a multiple of 3. Beat the Speed King. Drive either Datsun
(Type-S30Z or S30ZG). (For tuning tips, see section 9.)
#353 - Tomorrow Again
Do the mileage trick (See section 4) and equip a level 8 muffler. That means
that you'll have to have 1860 miles on your current car. To get him to
appear, you're going to need to do some math. There is an example underneath
this explanation, so follow along with the example. Take a look at what day
you're on. Take only the ones digit and tens digit (drop the hundreds digit
as it will not be a part of your calculations). Multiply the tens digit and
the ones digit of the remaining number. Now that you have that particular
number, take the ones digit from that number. See if this number is a 4.
Example: Day 227:
Drop the 100s digit from 227 and you get 27. (Look at it like 2 "27".)
Multiply 2 x 7 = 14.
Take the ones digit from this number. (Look at it like 1 "4".)
The number you get is 4. This means that he will appear. He will not appear
if the final number is not a 4.
#354 - Healthy Hero
Have less than 124 miles on car. Get a year 2000 model car. My favorite is
the Lancer Evolution VI, (Type-CP9A6M).
#355 - Late Night Cinderella
She comes out between 0:00 - 1:00. That's midnight to 1:00 A.M. Try
resetting your Playstation's clock.
Note: Another requirement has not been found yet, but some people have
reported that she will cancel the battle.
**********Wangan South Bound**********
#356 - Unbalanced Heart
Have less than 32 miles on your current car.
#357 - Toll Free
The day must be a multiple of 3. You have to drive a Viper (Type-VGTS). To
get a Viper, see section 2.
#358 - Madness
Defeat Rival #318: Lone Wolf
#359 - Technician Guy
Have 10 cars in your garage.
#360 - Fast Phobe
He's parked in Haneda. He's located in an off-ramp near the far right part
of Wangan. This part on Wangan is very close to Shinkanjyo. To get him to
appear, you're going to need to do some math. There is an example underneath
this explanation, so follow along with the example. Take a look at what day
you're on. Take only the ones digit and tens digit (drop the hundreds digit
as it will not be a part of your calculations). Multiply the tens digit and
the ones digit of the remaining number. Now that you have that particular
number, take the ones digit from that number. See if this number is a 4.
Example: Day 227:
Drop the 100s digit from 227 and you get 27. (Look at it like 2 "27".)
Multiply 2 x 7 = 14.
Take the ones digit from this number. (Look at it like 1 "4".)
The number you get is 4. This means that he will appear. He will not appear
if the final number is not a 4.
#361 - ZERO
It must be on or past day 365.
**********Yokohane South Bound**********
#362 - SPEED BOX
The day must be a multiple of 5. Defeat #367: Iron Racer. Drive an NSX
(Types RPT7B, RPT6B, RPT7, or RPT6)
#363 - Mask
He parked at the end of an on-ramp somewhere in the middle of Yokohane. To
get him to appear, you're going to need to do some math. There is an example
underneath this explanation, so follow along with the example. Take a look
at what day you're on. Take only the ones digit and tens digit (drop the
hundreds digit as it will not be a part of your calculations). Multiply the
tens digit and the ones digit of the remaining number. Now that you have
that particular number, take the ones digit from that number. See if this
number is a 2.
Example: Day 226:
Drop the 100s digit from 226 and you get 26. (Look at it like 2 "26".)
Multiply 2 x 6 = 12.
Take the ones digit from this number. (Look at it like 1 "2".)
The number you get is 2. This means that he will appear. He will not appear
if the final number is not a 2.
#364 - Windy Fanfare
Get 3 million dollars in your pocket. Then race her.
#365 - Start Dash
You must be on or past day 180.
#366 - Golden License
Defeat #334: Dark Desperado.
#367 - Iron Racer
The day must be a multiple of 5. Drive the classic C class cars. They can
be these cars: Skyline (Type-KPGC10), RX3 (Type-RX3), or the Datsun (Type
S30Z). The owners of these cars are Loyal Knight, Gentle Rain, and Craft Man
respectively. (For tuning tips, see section 9.)
**********Yokohane North Bound**********
#368 - Exotic Butterfly
Defeat #399: White Charisma.
#369 - King of Eden
The day must be a multiple of 7.
#370 - Loyal Knight
The day must have the number 3 as a digit. Here are some examples: 300, 213,
133, 3, 43, etc. Have a level N engine. Defeat #371: Gentle Rain.
#371 - Gentle Rain
Do the mileage trick (up at the top of this FAQ) and get 1860 miles on your
car. Race him with THAT car.
#372 - Last Flight
The day must be a multiple of 10. Defeat Team ALPHA. Do 249 mph (or 400
kmph for those of you with the import) in a single battle. You might have to
end the battle at this speed. Here's a hint on how to go that fast: get 1860
miles on Speed King's car. Get the Level 7 Engine, Level 8 muffler, and
Level 5 Body Tune. That should help you get up to speed. Also, you might
have to have those mileage parts equipped on your car. If all else fails,
try getting a lot of wins.
#373 - Silent Barbarian
Defeat #346: Storm Screamer.