Once you have the raw code list (usually in a text file), you can compile them into a .gct file using (part of the Gecko OS suite). Here are a few fan-favorite codes:
Maintain a permanent speed boost without ever draining your injection tank. 042B3F04 3F800000 Use code with caution. Infinite Speedbreaker need for speed most wanted gamecube gecko codes link
The Ultimate Guide to Need for Speed: Most Wanted GameCube Gecko Codes Once you have the raw code list (usually
Unlocking Need for Speed: Most Wanted on GameCube: The Ultimate Gecko Codes Guide Infinite Speedbreaker The Ultimate Guide to Need for
Instantly grants maximum Bounty points. This bypasses the milestone requirements needed to challenge higher-ranked Blacklist rivals. $Max Bounty [NTSC-U] 0456C9A4 05F5E0FF Use code with caution. Unlock All Blacklist Cars and Performance Upgrades
(Note: If you are playing on the Dolphin emulator, you do not need to manually enter a master code. Dolphin handles memory hooks automatically.) Essential Gecko Codes for NFS: Most Wanted