Metroid Prime Codes

Courtesy of GameFAQs
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Play Original NES Metroid on GameCube via Link Cable
To make this work, you will need a copy of Metroid Fusion for GBA and a copy of Metroid Prime for GCN. Once you have beaten Metroid Fusion, connect the GBA (with the Fusion cartrdige in it) to the Cube via the Game Boy Advance link cable. You will now be able to play NES Metroid... and save on the Cube Memory Card.

See Your Reflection
There are several refelective dome-shaped wall hangings placed around the world of Tallon IV. If you stand in front of it you can see a reflection of Samus staring back at you.

Unlock Gallery 2
Collect 50% or more of the items.

Unlock Gallery 3
Collect all items (100%).

Unlock Gallery 4
Clear the game on Hard Mode.

Unlock Hard Mode
Clear the game to unlock Hard Mode.

Unlock Image Gallery I
Scan 50% of the research and creature data to unlock Image Gallery 1.

Unlock Metroid Fusion Suit For Metroid Prime
To make this work, you will need a copy of Metroid Fusion for GBA and a copy of Metroid Prime for GCN. Once you have beaten Metroid Prime, connect the GBA (with the Fusion cartrdige in it) to the Cube via the Game Boy Advance link cable. The Metroid Fusion suit will now be available in the File menu of Prime.

View Idle Animations
Want to see what the heroine of Metroid Prime does when she's not hunting Metroids and Space Pirates? Don't touch your controller for a few seconds and Samus will start to relax her posture slightly, then opens a flap on her Power Blaster and fiddles with the controls. Okay, perhaps it's not the most exciting thing in the world, but cool nevertheless.