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| All Tune-ups | 100% | |
| Go to the start screen.Hold R+L and press down/right. | ||
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| Status - Password | 100% | |
| 50% of cars unlocked - /6Kb /xMi irLM +/22 High speed mode unlocked - 2QjD +D1Q 9Fy2 5B0C | ||
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| Extra mode 1 | 100% | |
| Go to the screen with "Start" and a picture of the car. Hold R + L, then press Right + B until a chime is heard. Alternatively, select championship mode and win the beginner, middle, and high speed classes. An "Extra 1" option will now be unlocked at the main menu. Select it to race in mini-cars. | ||
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| Cheat Mode | 100% | |
| Password: 2QjD +D1Q 9Fy2 5B0C | ||
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| Extra mode 2 | 100% | |
| Go to the screen with "Start" and a picture of the car. Hold R + L, then press Left + B until a chime is heard. Alternatively, select championship mode and win all 4 classes. You must finish in 1st place in all races. This will unlock the Formula 1 car and the "Extra 2" option at the main menu | ||
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| View Credits | 100% | |
| At the "Start" screen, hold L + R and press Up, B. If done correctly, you will hear a chime. | ||
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"GT Advance Championship Racing" for Game Boy Advance features more than 40 authentic cars with parts that can be upgraded from seven top car manufacturers including Honda, Mazda and Mitsubishi. As players progress, they can unlock cars with varying acceleration, top speeds and overall handling in order to master the 32 tracks. "GT Advance Championship Racing" also allows players to race head-to-head with friends using the Game Boy Advance link cable. 
