Start a new game with the STORY mode. Right after the starting scene, you will be in your new dining room where the game gives you options to customize its colors.
There are five options for your dining room; they are (in order): Kabe (Wall), Ka-ten (Curtain), Ka-petto (Carpet), Sofa- (Sofa), and Posuta- (Poster). You will have to choose a color for each of them.
Choose Wall=kiiro (yellow), Curtain=midoriiro (green), Carpet=kiiro (yellow), Sofa=kiiro(yellow), and Poster=Shu-ru (Surreal).
Your money will then be raised to 30 million yen!
Start a new game. When the screen prompts you to enter a name for your hero, enter the Japanese hiragana:
GoBuRin
Then when you enter the combats with your party members, you will never die!
Start the story mode of the game. You will have to enter a name for your character. Enter "Do-H-Ga-Me" in Japanese hiragana, which literally means "dumb tortoise".
Then when you have control over the character's action in his dining room, choose the option "Dogu o Tsukau", which means "Use an Item". And then choose "Jetoenjin", which is a phonetic borrowing of the words "Jet Engine". Then your car will have excessively strong power on the wet course!
Reach the very last race against the champion. Lose to the champion 10 times. Go back to the showroom and you can now purchase the ultimate overpowered car--the Fannicar. No car can stand a chance against your Fannicar now!