Classic Passwords - Once you beat Metroid Fusion for the GBA and link up to your Gamecube you can play classic Metroid. The following passwords are for the Classic Metroid game. Enter these by pressing Z at the main menu while your GBA and Gamecube are linked.

Password Effect

X-z-uJ lls0W0 fVvweG 000WNr 215 missiles, 5 energy tanks, all powerups, both mini-bosses dead
000000 000000 03-200 000089 255 missiles, but no missile tanks
ITs-JU ST-YOU ZIPO-- ----Ci Begin in Nofair, Mother Brain killed, Maru Mari, Varia, 212 missiles
JUSTIN BAILEY ______ ______ Begin the game with all power ups and Samus will not be wearing her suit.
NARPAS SWORD0 0000__ ______ Begin the game with infinite life, infinite ammo and all upgrades.
X----- --N?WO dV-Gm9 W01GMI Best Ending
BOMBS_MISSLE SCREW_ATACK Debug Mode
00U--- -u0000 0AFw9Y 1800sb Fight Ridley
999999 999999 KKKKKK KKKKKK Hard Mode
NARPAS SWORD0 000003 037251 Invincibility and Infinite Missiles, plus Ridley & Kraid dead
NARPAS SWORD0 000000 086073 Invincibility and Infinite Missiles, plus Ridley dead
V - - - - - - r - e69 t?A00e 00M04p Start at Tourian, all powerups, ready for the 2nd ending
0iF - - - - - - w - q 3ax - 50 0000wx Start at Tourian, all powerups, suitless Samus, ready for the best ending
OV - - - - - - r - e6 9t?A08 000GTq Start at Tourian,all powerups , ready for the 4th ending
7 - - - - - - zVw1Y T - YW01 - W5WCl Start at Tourian,all powerups , ready for the 5th ending
5X - - - - - - - N?W OdVue0 0000iu Start at Tourian,all powerups , ready for the best ending
X - - - - - - - N?WO dVue08 001GL2 Start at Tourian,all powerups, ready for the 3rd ending
000000 000000 0Fy000 00003- Start with 255 missiles
000000 000000 4G0000 00000H Start with Bombs (and Maru Mari)
000000 000000 080000 0000Y8 Start with Ice Beam
000000 000000 100000 000004 Start with Long Beam
000000 00000G 7?2ruA 005WFh Start with Suitless Samus, 5 Missiles, All Upgrades, No Energy Tanks
000000 000000 040000 0000X8 Start with Wave Beam
CONTIN UE_MY_ GAMEMI NIBOSS Starts you in the beginning with armorless Samus and no powerups. Can enter Tourian from the start.
mMuiS1 II6-GE Jls?h0 m00WRM Suitless Samus and all Weapons
000000 000020 000000 000020 Suitless Samus at Start.

Unlockables - Beat Metroid Prime to unlock Hard Mode. In this mode, enemies attacks are more powerful than normal.

Multiple Endings and Bonuses

Unlockables

Ending 1 Beat the game at 74% Complete, or less.
Ending 2 Beat the game at 75-99% Complete.
Ending 3 Beat the game at 100% Complete.

Unlock Art Galleries

Art Gallery 1 Scan 50% of the logs in the game.
Art Gallery 2 Scan 100% of the logs.
Art Gallery 3 Beat the game on Hard Mode.
Art Gallery 4 Collect all the items in the game.