You swap motors, change tires for different track surfaces (carpet vs. asphalt vs. dirt), adjust gear ratios, and even manage battery voltage. The racing itself is semi-automatic—you pick when to use boost and when to brake on sharp corners, but the car runs on its own.
I tested the v0.95 patch on both MelonDS (PC) and an R4 card on a Nintendo DS Lite. Here are the performance notes: bakusou kyoudai let 39s amp go eternal wings english patch