You effectively need a memory card for almost every GameCube game. The console has no internal save storage whatsoever—the "internal save" myth stems from temporary audio RAM caching (lost on power-off) and tiny controller settings stored in console flash memory.
| Card | Blocks | Notes |
|---|---|---|
| Official 59 Block (Black) | 59 | Standard, reliable. |
| Official 251 Block (White) | 251 | 4x capacity, same physical size. Best value. |
| Official 1019 Block (Gray) | 1019 | Rare, expensive, occasional compatibility issues. |
| Third-Party (Mad Catz, Nyko, etc.) | 128–2048 | Cheaper, higher failure rate. Avoid for critical saves. |
| SD Card Adapter (SD2SP2 / SD Gecko) | SDHC (32 GB+) | Best modern option. Loads homebrew, Swiss, saves to SD. Requires modded GC/Wii. |