Zero-4 Champ RR

¥30 million:
Start a new game in story mode and enter O Ka Ne Mo Chi as a name in Haragana.

Jet engine:
Start a new game in story mode. Enter Ma Ke I Nu as a name in Hiragana. Then in the dining room, select the "Use Item" option to access the "Jetoenjin" feature inside the black drawer. Press L + R during a race to use it.

Ending sequence:
Start a new game in story mode. Enter Su Taffu as a name in Hiragana.

Background graphics gallery:
Start a new game in story mode. Enter BG in English followed by Mi Se Te in Hiragana as a name.

Hero image:
Start a new game in story mode. Enter O in Hiragana, followed by BJ in English, followed by Mi Se Te in Hiragana as a name.

Sound test:
Start a new game in story mode. Enter Go Ki Bu Ri- Na as a name in Hiragana.

Delete track records:
Start a new game in story mode. Enter Ra N Ku in Katakana followed by Ke Shi Te in Hiragana as a name.

Delete all game data:
Start a new game in story mode. Enter Me Mo Ri in Katakana followed by Ke Shi Te in Hiragana as a name.

Free Traction C part:
Enter the pit shop. When the man greets you, hold X, press Left, Up, Down(2), Up, Right, Up, Down(2), Up, Right, Up, Down(2), then release X.