F-Zero

Password Screen:
At the machine selection screen in grand prix mode, press L, R, Start, R, L, Select.

Jet Vermilion Car (much easier then winning 255 times):
Go to the pass word screen an put in this code: H-M2XLT8A-30 and at the car select screen push up to use the Jet Vermilion car.

In-Game Reset:
Press Select + Start + A + B during game play.

Open All Tracks:
Press B, Left Trigger, B, A, Right Trigger, B, B, A, A.

New Cars:
Press A, A, B, A, Left Trigger, Right Trigger, A, B, Left Trigger.

Faster Cars:
PressA, B, Left Trigger, A, A, Right Trigger, B.

Slower Opponents:
A, Right Trigger, L, B, A, A, B, Left Trigger.

Demonstration Mode:
Press Select at the title screen.

Delete Saved Games:
Hold L + R and turn on the Game Boy Advance. Select "Yes" at the prompt to delete your game saves.

Dirty Joker:
Win the Pawn, Knight and Bishop tracks while playing the standard difficulty setting.

Falcon Mk.II:
Win any set of tracks while playing the expert difficulty setting.

Fighting Comet:
Win the Pawn, Knight, Bishop and Queen tracks while playing the master difficulty setting.

Silver Thunder:
Win the Queen tracks while playing the expert difficulty setting.

Stingray:
Win the Pawn, Knight and Bishop tracks while playing the expert difficulty setting.

Jet Vermilion:
You can unlock Jet Vermilion by unlocking all other cars and completing championship mode 255 times. Or beat every series on Master Class with all other racers.

Master Difficulty Setting:
Win the Pawn, Knight, or Bishop series while playing expert difficulty level in grand prix mode to unlock the master difficulty for that series.