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Finish the game with a 74% or less completion percentage for the
normal ending sequence. Finish the game with a 75% to 99% completion
percentage to view an alternate ending sequence. Finish the game
with a 100% completion percentage to view the best ending sequence.

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Note: This trick requires Metroid Fusion and the Game Boy Advance
and a link cable. Successfully complete Metroid Fusion and save
the game. Connect both games with the link cable to unlock the classic
NES version of Metroid.

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With the first gun equipped, rapidly press Y + A. As soon as the
missile fires, the gun will switch back to beam weapon mode, but
when you press Y again, it fires another missile. This can take
down enemies in a shorter time, preventing them from having more
attacks on you.

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Successfully complete the game under the hard difficulty setting to unlock Image
Gallery 3. When this gallery is opened, there will be a map of the entire game,
indicating where everything and everyone is. The left side of the map will have a
legend on it.

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If energy or ammunition is out of your reach, aim and charge your
beam. The energy or ammunition will come to you.

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

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Shoot any beam weapon repeatedly for about thirty seconds. When
you stop, a heat wave can be seen in front of the arm cannon.

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Use Ice Beams or charge an Ice Beam at it and finish it with one missile.

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Leave the controller for a while and Samus will relax and open the flap on her Power Blaster to fiddle with the controls.

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Successfully complete 50% of the research and creature data scans
to unlock the Image Gallery 1 option.

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Successfully complete 100% of the research and creature data scans
to unlock the Image Gallery 2 option.

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Successfully complete the game on hard mode to unlock the Image
Gallery 3 option.

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Find 100% of all power-ups to unlock the Image Gallery 4 option.
Note: This does not include the Log Book.

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Hold Start + B + X for two to three seconds during game play.

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When you enter the Chozo Ruins, aim your gun skywards. You will
see birds flying. Shoot the birds and they will explode, with feathers
all over the place.

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When the Elite Pirates burst out of containment, switch to your
normal beam and build up a charge shot. When the Elite is not trying
to absorb energy, fire a Super Missile at them. Two Super Missiles
will take them down. Use the following tactics to defeat the different
kinds of Elite Pirates at the Phazon Mines. This is a very difficult
area due to switching beams for certain pirates:

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Note: This trick requires Metroid Fusion and the Game Boy Advance
and a link cable. Successfully complete Metroid Prime and save the
game. Connect both games with the link cable to unlock Samus' Metroid
Fusion costume.

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Beat the game at 74% or less to get ending 1
Beat the game at 74-99% to get ending 2
Beat the game at 100% to get ending 3

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If you have unlocked the Origanal Metroid game, then this cheat is for you. If not don't bother Reading!! Go to the Menu (Where it says START and CONTINUE) Then press the Z button to go to the Continue Menu. Then Type in this EXACTLY:

JUSTIN BAILEY
------ ------ If this does not work, replace the dashes with Zeros:

JUSTIN BAILEY
000000 000000

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You will need a copy of Metroid Fusion for the Game Boy Advance to get this. When you have beaten Metroid Prime, connect your Game Boy Advance with a link cable and you will be able to play the classic NES Metroid on your GameCube and you will get access to the Metroid Fusion Suit in the File Menu.

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To acquire the Phazon Suit, you must defeat the Omega Pirate. The
Phazon Suit makes you immune to most forms of Phazon radiation.
It also comes equipped with the Phazon Beam, which can only be activated
during the last Boss fight.

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Fire at them with your Plasma Beam three or four times. Hide behind
a wall and the Plasma Beam will end up finishing them with its burning
effect. Do this to other pirates as well, even though they only
need about three shots to be killed, only about one will evaporate
them if you just wait patiently.

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Beat Metroid Prime then connect it to your metroid fusion game on Gameboy Advance and you can play Metroid Prime in a fusion suit.

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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.

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Use Normal Beams or charge a Normal Beam at it three to four times.

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Successfully complete the classic Metroid game in under two hours
to view Samus without her suit during the ending sequence.

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To see Samus' reaction within the helmet inside of the reflection,
charge and shoot directly at the ground. Note: Try this in an icy
place.

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To see Samus' reaction within the helmet inside of the reflection, charge and
shoot directly at the ground. Note: Try this in an icy place.

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Use the Thermal Visor to see them. Use Wave Beams or charge a Wave
Beam at it at full force (two to four times); or, fire with ease
with the Plasma Beam.

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While playing the game on any level, press L,R,L,R,L,B,Y,Z
(This cheat is not tested!)

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Scan 50% of the logs in the game to unlock the first Art Gallery.

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Scan 100% of the logs to unlock the second Art Gallery.

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Beat the game on hard mode

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Collect all the items in the game.

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To unlock the original NES Metroid, simply beat Metroid Fusion on GBA, then link the GBA (with Fusion in it) to the GCN (with prime in it) then at the main menu of prime goto the bottom where it says GBA link bonuses or something like that. Make sure you have beaten Metroid Fusion though.

To unlock the Metroid Fusion Suit, do the exact same thing only dont beat fusion, but beat prime.

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Use Wave Beams or charge a Wave Beam at it (two to four times).

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