Tokyo Highway Battle R All parts
At the title screen, press Right(2), Down, Up(2), Left, Down, Left, Circle, Triangle on controller two.
Bonus parts
At the title screen, press Up, Down(2), Up, Left, Right, Left, Right on controller two.
Maximum funds
At the title screen, press Up, Triangle, Down, X, Right, Square, Left, Circle, Select, Start on controller two.