NOTE: These are the main Metroid Fusion cheats that are usually applied by pressing down the right key combination. Please find the instructions on how to use these cheats below.
Samus without her suit
Successfully complete the game with a time under 6:30
and all items (100%) to see Samus Aran without the suit,
wearing something similar to a bathing suit.
Delete saved data
Turn on the Game Boy Advance while holding L + R. Keep
the buttons held until the message "Do you want to erase
all saved memory?" appears. Move the missile over to
"Yes" and press A.
Samus without her suit
Successfully complete the game with all items (100%)
to see Samus Aran without the suit, wearing something
similar to a bathing suit standing.
Alternately, complete the game in under two hours with
at least 50% of the items collected to see Samus without
the suit, leaning.
Samus without her helmet
Successfully complete the game with a time less than
three and a half hours and at least 48% of the items
collected.
Wall jump
To reach platforms easier, spin jump next to a wall,
press the D-pad opposite to the direction that you went,
then jump. Samus will touch the wall and propel herself
off it in a another jump. This can be done repeatedly.
Once you have the space jump, this is unnecessary.
Fire over ledge while hanging
You can fire over the ledge that you are hanging on
by charging the Beam and releasing it. Note: This may
only be done with the Wide Beam.
Wide range missile block destruction
Once you have received the Diffusion Missile upgrade,
go into a room with missile blocks that are difficult
to reach. Launch a Diffusion Missile. When you do this,
all the missile blocks in the "diffusion ring" will
be destroyed. This is useful if there are several missile
blocks in one area.
Speed boost warp
Once you have defeated Serris, find a place to run.
Keeping going until you get your speed boost, then press
Down, A and choose the direction you wish to move. Samus
will warp at very high speed, destroying anything in
her path until she strikes a solid object that is not
made of speed booster blocks.
Super warp jump
This is slightly difficult to perform and may require
a few attempts. Find a place to run until your Super
Run kicks in. This is obtained after you defeat Serris.
Then, quickly press Down. Samus will kneel down and
glow. Then, jump. Samus will fly upward until she hits
a solid object not made of speed blocks.
Hyper Screw attack
This move is used while performing the Speed Booster.
Note: You will also need the Screw Attack. While running
in hyper mode, jump forward into a Screw attack and
do not stop moving forward. You will notice that you
will still be in hyper mode while airborne. If you continue
the Screw attack with the Space Jump and never stop
moving, you will remain in hyper mode until you run
into something solid or stop moving. This technique
is very useful for breaking boost blocks with no extra
running space around them.
Pseudo Screw attack
To kill a host of an X parasite without being attacked,
charge your beam to full power and perform a spinning
jump into the enemy. This will destroy most minor enemies
in one hit. The stronger ones (for example, Zebesian
Space Pirates) will take more hits, but you will sustain
damage each time you hit them. This maneuver will also
work on certain Bosses. The real Screw attack gained
by defeating Ridley X is far more powerful. granting
you invincibility and the ability to destroy all enemies
(except Bosses) on contact.
Defeating Arachnus
Fire a missile when it takes form (its stomach). It
will now do one of two things. If it throws a blue slash
at you, jump over it and fire another missile. If it
spits fire at you, jump up and grab the small ledge.
Press the D-pad in the opposite direction and prepare
to jump. Jump immediately before he hits the wall. Repeat
this until Arachnus is defeated.
When the first set of fire comes down, turn into your
Morph Ball and go all the way over to the fire ball
on the right. Wait until it starts to go to the middle.
Then, keep shooting missiles (when the spider is charging
up) until it shoots the three fire balls. You will get
hurt, but at least you will hit him. You have to keep
going next to the fire balls until he loses his legs.
Once this happens, you can go to the right of the stage
and shoot missiles up at him. When he turns red, go
to the left of the stage and shoot up.
Defeating Nightmare
When you get to the room with organism Nightmare, wait
for it to fully appear. When it does, it will shoot
a group of missiles/lasers at you. It goes up and down
inside the room. When it is up, run underneath and shoot
a missile at it. Shoot at the circle thing under it.
Repeat this process until it only starts to shoot two
lasers. You must then use the Charge Beam. Shoot at
the same spot as you did with the missiles. Kept repeating
this process. When it starts to explode, avoid the lasers.
When its face falls off, jump onto the ladder on the
wall and shoot missiles at it. When it reaches the wall,
it will fly around. This is hard to avoid, but try to
do so. Repeat this process until it turns into the ball.
You should then know how to kill it. You will get the
Gravity Suit ability. Note: You should have at least
six energy bars.
Defeating Omega Metroid
This trick is easy to do and with some luck, you will
not get hit at all in the entire battle. When the Sa-X
sacrifices itself, get the Ice Beam. Then, when you
start shooting the Boss in the chest, rapidly press
B to keep hitting it. The Omega Metroid should cry in
pain several times and will not be able to hit you.
In the battle with the Omega Metroid, when it swipes
you, Samus will become motionless for a few seconds.
However, if you rapidly press Up, you will cut this
time down dramatically.
Defeating Ridley
When you walk into the arena, charge up your beam and
shoot it at Ridley. Do this about seven to ten times.
Ridley should get red quickly.
When his eyes start to glow, charge up your Wave Beam.
When he breaks free, shoot him. When he tries to grab
you, you should try ducking. However, if he gets you,
keep shooting missiles at him rapidly and he will release
you, crying out in pain. When he is in the air, keep
shooting him with your charged beam and he should die
quickly.
Defeating SA-X
When you first get into the room where you fight SA-X,
charge your Power Beam and go up to the door. Stay with
ground combat. Since it is charged, keep it like that
and wait until he is normal (and not a green ball and
invulnerable). Take the first shot, then hold it down
to charge again. He should jump into the air and land
next to you. This is your chance to shoot. Do the same
thing repeatedly until he gets fuzzy. When you hit him
he will turn into a giant monster. The only way he can
hurt you is to jump on you. Charge up your beam and
hit him in the face four times. His eyes will go red.
Walk next to him and he will die. On the spikeball,
charge up your missiles, When his eye opens up, shoot
then jump over him immediately. If you run low on health,
use your Screw Attack and hit him. A group of Xs will
appear. Collect as many as needed. You can do this repeatedly.
When SA-X enters, freeze him with an ice missile and
charge up your beam. Continue this to defeat Sa-X in
about two minutes.
Charge up your beam and spin jump to get him to follow
you. While in the air, jump to reach the bottom. When
he jumps, shoot your beam at him. Then do it all again
until he transforms. Next, stand on the middle platforms
and shoot him with a charged beam, then jump to the
other side and do it again. When he changes again, treat
it like the wide core-X. This requires practice.
When SA-X appears, charge up your beam and jump to the
bottom floor. He will soon follow. Then, quickly jump
up to the top right platform. If done correctly, he
will jump on the platform. Immediately jump to the bottom
floor and shoot at him when he comes down. Repeat this
process several times until he turns into his monster
form. The only way he can attack you is by jumping on
you. You must charge up your beam and shoot him four
times, including dodging his jumps. He will then turn
into a large Core-X. Charge up your missiles to full
then shoot his eye when it opens. When he takes damage,
jump over him before he shoots you. Repeat this process
a few times. If you run low on health, jump into him
with your Screw Attack and he should release some.
Go into the room and make him appear. Then, just fall
down onto the little ledge above the first door. When
he tires to jump up by you, keep blasting him with your
charged weapon. Then on the X, just use your charged
Ice Missiles to kill it when its eye opens.
Defeating Sirrus
When fighting Sirrus when it is zooming around the room,
attach yourself to those things you can climb on to
the ceiling.Information in this section was contributed
by Pikachu946500057. When fighting Sirrus, stay on the
middle block on the floor (the one that started the
battle) until he comes at you. When he does that, jump
up and grab the ladder on the ceiling.
Be very careful. It can appear from anywhere. When you
have a clear shot, hit it with a missile in the head.
Do not worry if you miss; as most of this is luck. If
you hit it in the head, it will pause momentarily. Get
out of the way. It will go around very quickly. You
can only hit him once he calms down. Repeat this until
he is defeated.
When you enter Sirrus' lair, climb up the ladder in
front of you. Run and jump across the platform until
you reach the other side. Watch out for Sirrus when
you do this. When you get to the far side (the side
that you exit later), jump onto the ladder and climb
to the very top. From here, Sirrus cannot hit you unless
he does a high jump. To hit him, fire missiles at his
head when he is not flashing. Alternately, you can use
the Charge Beam to hit him. You can also do this if
you run out of missiles. The easiest way to defeat the
X at the end is to dive underwater and hit it with missiles
there.
First, go onto the platform and run around on there
until you hear an earthquake. Then, quickly go onto
the ladder on the right and you can fire either five
missiles into Sirrus' head or charge up your beam and
fire four times. When he cries out in pain, get your
missiles ready. Then, just shoot the Core X until the
thick membrane is destroyed.
Defeating Tube Parasite
You cannot hurt it at the moment, so prepare. Charge
your beam up. The Boss will jump around. Hold the charge.
Wait for the jump where a disk will appear below it.
Run under it and shoot the charged beam at the disk.
Then immediately afterwards, fire a missile after it.
Next, run to the side with the most room. if the disk
touches you, you will be sucked inside and damaged.
When the head is left with the feet, the first jump
will bring out the disk.
Collecting "cold" X easier
After getting the Vira suit, the cold (large blue) X
will try to evade you and leave. Shoot to stun them
and easily collect them.
Collecting all X easier
Once you have the Power Bomb, go to a room where there
are a lot of X Creatures/Parasites. Press Down(2) to
morph into your ball form, then lay a Power Bomb. Do
not move away from the bomb. When it explodes, not only
will it destroy all onscreen enemies (unless the enemy
is very powerful) and stun all the X parasites that
appear, but the vacuum will pull all onscreen X parasites
back to you. This can be done as many times as needed,
depending on the amount of Power Bombs you have.
Increaced
When you have to do the last objective with the wind
machines, gather X Parities to get a lot of life.
Invincibility
Charge up Charge Beam (if available), and do a Spin
Jump.
Hidden Energy Tank
When you are in the first Boss's room (that says "target"
and makes the beeping sound on your map), ledge jump
until you collect your first Energy Tank. Proceed until
you reach a hole, but do not drop down. Instead, stand
at the left platform one unit before the hole. Fire
a missile into the ceiling. If you shot the correct
location, a hole will appear. Shoot a beam into the
hole in the ceiling and jump up. Go to your right. Drop
down to receive an Energy Tank. Wall jump out and drop
into the hole you passed earlier to fight the first
Boss.
Skipping levels
After you go through the restricted section, go to the
navigation room just beside the elevator. When you talk
to it, it will instruct you to go to another place.
If you want to skip a couple levels, talk to it again.
It will instruct you to go to the Operation room to
set a collision course with a planet. You will now be
able to go there.
Glow
Go to the main deck and stand on top of Sector 6 elevator.
Then, run until you are going turbo. About five seconds
after doing this, press Down(2) and Samus will keep
glowing for a few seconds.
Gamecube
Near the start of the game when the X are tying to make
the environment to their own conditions and block the
fans, go to one blocking the fans (the ones that you
have to kill with missiles and give off X Parasites).
It will be floating around. Look at the top left of
it, in the very corner of the X. You will see a Gamecube.Information
in this section was contributed by CJ McIntosh. Complete
Sector 3 the first time. Once up on the elevator, an
intermission will start, and the Navigation screen will
read "Incoming Dispatch" with a GameCube at the bottom
of it.
Gallery mode (Japanese version):
Successfully complete the game to unlock the Gallery
Mode option.
Hard difficulty setting (Japanese version):
Successfully complete the game under the normal difficulty
setting to unlock the Hard Mode option.
Power freeze
Note: This can be done once. When you reach Ridley,
you can slow down time momentarily while fighting him.
When you enter his room and Ridley's eyes glow, plant
a Power Bomb. Then, quickly leave ball mode and begin
charging a Diffusion Missile. Shoot it exactly at the
same time the Power Bomb detonates at Ridley (for the
best and longest effect). Ridley should have done its
battle cry and it will sound slower than normal. Your
movement will slow down as well. This effect will remain
as long as the two explosions are still on screen. This
can done even while Ridley is in flight.
Glitch: Transparent X
Go to sector1 and kill the dog-like creature. Get the
X (health)and nothing will happen for a while. Later
on, you will get health.