Metroid Fusion Wiki
Explore the BSL research station, defeat dangerous bosses, collect every upgrade, survive the SA-X, and uncover the full story of Samus and the X Parasite.
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Metroid Fusion full map: Sector-by-Sector Route Guide
Use this Metroid Fusion full map guide to navigate the Main Deck, all six Sectors, ability gates, doors, hidden routes, and 100% cleanup paths.
Metroid Fusion item map: Locations, Routes & Checklist
Use this Metroid Fusion item map to track upgrades, Missile Tanks, Energy Tanks, Power Bomb expansions, and efficient Sector cleanup routes.
Metroid Fusion Neo Ridley: Ridley-X Boss Tips & Route
Learn how to defeat Metroid Fusion Neo Ridley, also known as Ridley-X, with attack patterns, positioning tips, missile strategy, and recovery advice.
Metroid Fusion Adam: Story Role, AI, and Key Traits
Learn how Adam guides Samus in Metroid Fusion, including his AI identity, mission orders, story importance, and final decision.
Metroid Fusion plot: Story Walkthrough & Lore Guide
Follow the Metroid Fusion plot from Samus's infection on SR388 to the B.S.L. station outbreak, SA-X reveal, and final escape.
Metroid Fusion Switch: Setup Guide, Features & Tips
Learn how to access Metroid Fusion on Nintendo Switch through Game Boy Advance Nintendo Switch Online, with setup steps, controls, tips, and FAQs.
Metroid Fusion ending requirements: Completion Guide
Learn Metroid Fusion ending requirements, item percentage goals, clear-time targets, and a practical route for the highest ending tier.
Metroid Fusion all endings: Completion & Time Guide
Learn how Metroid Fusion endings work, compare completion goals, improve clear times, and prepare for the highest completion ending.
Metroid Fusion sector 6 map: Route Guide & Item Tips
Use this Metroid Fusion Sector 6 map guide to navigate NOC, handle dark rooms, track doors, avoid dead ends, and plan item cleanup.
Metroid Fusion Nightmare boss: Step-by-Step Fight Guide
Learn how to defeat the Metroid Fusion Nightmare boss with arena positioning, gravity-beam tactics, missile timing, and reliable preparation tips.
Metroid Fusion main deck map: Step-by-Step Route Guide
Use this Metroid Fusion main deck map guide to track elevators, navigation rooms, save points, upgrades, security doors, and late-game routes.
Metroid Fusion best ending: Completion Routes & Tips
Learn how to reach the Metroid Fusion best ending with a fast route, 100% item collection, efficient backtracking, and final escape preparation.
Metroid Fusion Walkthrough
Metroid Fusion guides the adventure through navigation-room objectives and locked-sector progression. Follow the route below from the B.S.L. outbreak to the final escape, with the ability gates that most often stop players called out along the way.
Main Deck — Return to the B.S.L. station
After the opening events on SR388, Samus returns to the Biological Space Laboratories. Receive briefings from Adam, learn the elevator network, and enter Sector 1 for the first investigation. Several doors stay locked until Adam authorizes new sectors.
Sector 1: SRX — Investigate the simulated SR388 environment
Find the Missile Launcher, open orange hatches, and confront the X-infected Arachnus. Keep moving when it rolls across the arena and strike after it exposes its vulnerable body to claim the Morph Ball.
Sector 1: SRX — Recover the Charge Beam
Download the Charge Beam in the Data Room and use charged shots against armored enemies. After the X outbreak changes the route, return through the newly opened passages toward the sector elevator.
Sector 2: TRO — Investigate the tropical sector
Follow the mission to the Data Room and acquire Bombs. Defeat the Bomb Guardian by dodging its charge and punishing the recovery window, then bomb suspicious floors and walls to reveal hidden routes.
Sector 6: NOC — Evade the SA-X and restore suit defenses
When Adam reports unusual SA-X activity, slip through the dark sector while breaking its line of sight. Download Hi-Jump Boots and the Varia Suit — early SA-X encounters are meant to be escaped, not fought.
Sector 4: AQA — Search the aquatic sector
Clear submerged passages and confront Serris in the high-speed arena. Stay near open water, fire when Serris crosses a predictable line, and collect the Speed Booster for dash routes and Shinespark setups.
Sector 2: TRO — Super Missiles and Speed Booster routes
Return to the tropical sector, break speed-boost blocks in long corridors, and download Super Missiles to open green doors. Stop a boost with crouch, then press jump plus a direction to Shinespark across long gaps.
Main Deck — Repel the Yakuza at the Operations Deck
Adam sends Samus to the Operations Deck, where the Yakuza attacks from a vertically constrained arena. Aim for the exposed mouth, swing to the opposite side when it advances, and keep missiles for the final phase.
Sector 5: ARC — Ice Missiles and the frozen sector
Survive B.O.X. and its missile barrages, then download Ice Missiles in the Data Room. Freeze enemies into temporary platforms and re-test ice-covered rooms that were out of reach before.
Sector 5: ARC — Nightmare and the Gravity Suit
Face Nightmare, whose gravity beam warps jump height across the arena. Strip its armor, aim for the exposed core, and absorb the Core-X to claim the Gravity Suit for free underwater movement.
Sectors 3 and 6 — Plasma Beam and Space Jump
With station security loosened, revisit the volcanic and dark sectors to download the Plasma Beam and Space Jump. These late beams and jumps reopen older sectors and set up the endgame routes.
Restricted Zone — Destroy the X-infested station
Defeat the SA-X and Neo Ridley, absorb their X cores, and set the station on a collision course with SR388. Circle beneath the Omega Metroid's claws, fire at its exposed chest, and reach the evacuation ship.
Quick Tips
- Navigation rooms define the current objective — if a route is blocked, the required upgrade is usually somewhere else.
- New abilities reopen old sectors, so revisit the Main Deck elevators after every major upgrade.
- Save Rooms preserve progress and Recharge Rooms restore health; use both before any boss attempt.
- Backtracking is part of the design — late-game mobility turns early dead ends into shortcuts.
Metroid Fusion Beginner Guide
Metroid Fusion teaches its mechanics through gated exploration. New abilities change which rooms, doors, and tunnels are available, so learning the systems early makes the whole station easier to read.
Master movement first
Run, jump, crouch, and reposition constantly during combat. Midair direction changes matter because most bosses punish standing still.
Beams and missiles do different jobs
The beam handles ordinary enemies while missiles open colored hatches and burst armored targets. Charge the beam before difficult rooms and save missiles for what needs them.
Inspect the station as Morph Ball
Roll through narrow tunnels and bomb suspicious floors and corners — many apparent dead ends hide item rooms or alternate routes.
Read the map and navigation rooms
Colored doors point to the weapon that opens them. After every upgrade, re-check the sector map for newly accessible rooms.
Understand the X parasites
Destroyed hosts release X that restore health or ammo when absorbed. Grab them quickly while the room is safe, and use Ice Missiles to freeze infected enemies.
Treat the SA-X as a stealth hazard
The SA-X is stronger than Samus for most of the game. Break its line of sight with tunnels and side rooms instead of wasting missiles on it early.
Save often and recharge deliberately
Save after major abilities and dangerous sequences, recharge before optional detours, and farm safe rooms for X recovery when resources run low.
Think in ability gates
Missile doors, green doors, and speed blocks each announce a required upgrade — a blocked route is a clue about where to go next, not a wall.
Metroid Fusion Boss Guide
Most Metroid Fusion bosses reward pattern recognition more than aggressive damage trading. Enter with full health and missiles, learn each movement cycle, and absorb the X released after the fight to recover.
Metroid Fusion 100% Completion Guide
A 100% run in Metroid Fusion is really two runs: collect the obvious item rooms during the story, then perform one full cleanup lap after acquiring the Gravity Suit, Space Jump, Power Bombs, and the remaining beams.
Main Deck
Hub cleanupSweep elevator corridors, maintenance rooms, and passages that only open after late mobility upgrades — finish before the evacuation sequence begins.
Sector 1: SRX
Missile and Energy TanksReturn with Power Bombs and Super Missiles to crack missile blocks and narrow tunnels skipped during the first pass, including the late Screw Attack route.
Sector 2: TRO
Missile and Energy TanksGreen doors, bomb tunnels, and tall plant chambers all open up once Super Missiles, Power Bombs, and Space Jump are in hand.
Sector 3: PYR
Missile and Super Missile expansionsClear the heated side rooms after obtaining Power Bombs so hidden blocks go down in a single pass through the volcanic corridors.
Sector 4: AQA
Underwater expansionsThe Gravity Suit turns slow submerged detours into quick sweeps — collect the underwater Missile and Energy Tanks in one trip.
Sector 5: ARC
Power Bomb and Missile expansionsRevisit frozen rooms after the Nightmare sequence; ice-covered platforms hide tanks and Power Bomb blocks that were unreachable earlier.
Sector 6: NOC
Missile, Power Bomb and Energy TanksFreeze enemies into platforms and sweep the high ledges and long jump routes once water and cold no longer slow Samus down.
Restricted Zone
Late-game expansionsStory-gated area — collect its expansions immediately after the SA-X encounter and before activating the final evacuation.
Completion Tips
- The final escape sequence prevents normal cleanup — finish all collection before starting the ending.
- Speed Booster blocks and Shinespark routes hide the most commonly missed expansions.
- Compare the in-game percentage against unexplored dots on every sector map before the point of no return.
- Mark rooms that need a later ability during the story run so the cleanup lap can follow a direct route.
Metroid Fusion Item Locations
Metroid Fusion separates progression upgrades from optional expansions and regularly sends Samus back through earlier sectors. Use this checklist to find the next major ability or to clean up missed pickups.
Morph Ball
Claimed from Arachnus early in the run. Opens every narrow tunnel and low passage across the B.S.L.
Missile Launcher
Found on the first Sector 1 mission. Opens missile hatches and cracks armored enemies that resist the beam.
Charge Beam
Downloaded after the first Core-X fight. Charged shots save ammo and punch through heavier armor.
Bombs
Acquired in the tropical sector's Data Room. Breaks bomb blocks and enables bomb jumps in tight shafts.
Hi-Jump Boots
Raises jump height dramatically and makes the pre-Gravity underwater routes far more manageable.
Varia Suit
Downloaded while evading the SA-X. Cuts incoming damage and keeps heated rooms survivable.
Speed Booster
Taken from Serris in the aquatic arena. Unlocks speed blocks, dash routes, and Shinespark storage.
Super Missiles
Downloaded on the tropical-sector return trip. Opens green doors and deletes heavily armored targets.
Ice Missiles
Recovered in the frozen sector. Freezes enemies into temporary platforms and is required against Metroids later on.
Gravity Suit
Dropped by Nightmare's Core-X. Removes most underwater penalties and boosts overall protection.
Space Jump
Enables repeated midair jumps on the late dark-sector route, unlocking previously unreachable vertical rooms.
Plasma Beam
Downloaded on the volcanic-sector return visit. Pierces enemies and sharply raises beam damage for the endgame.
Metroid Fusion Map Guide
The B.S.L. is divided into a central Main Deck and six specialized sectors. Story objectives frequently reopen earlier areas, so the fastest route is usually determined by the latest ability rather than the nearest elevator.
Main Deck
Central HubConnects the Operations Room, Navigation Rooms, elevators, Data Rooms, Habitation Deck, and the Restricted Zone. Return here whenever the story updates objectives or opens a new route.
Sector 1: SRX
Early AreaA recreation of the SR388 environment with broad caves and vertical shafts. Check ceiling alcoves and Morph Ball tunnels — the late-game return unlocks a hidden Screw Attack route.
Sector 2: TRO
Early-Mid AreaA tropical sector of plant chambers and branching routes around the Data Room. Bomb blocks and destructible floors commonly conceal alternate passages worth revisiting.
Sector 3: PYR
Midgame AreaA volcanic sector of heated rooms and industrial corridors. Separate safe corridors from heat hazards on the map — several paths open only after beam and suit upgrades.
Sector 4: AQA
Midgame AreaA water-processing sector of submerged rooms and pump facilities. Before the Gravity Suit, underwater movement is slow, so mark vertical shafts for later revisits.
Sector 5: ARC
Late-Mid AreaA frozen sector with icy rooms and the Nightmare boss route. Track frozen enemies and suspicious blocks that become meaningful after Ice Missiles and the Gravity Suit.
Sector 6: NOC
Late AreaA dark sector of low-visibility rooms and long shafts. Use door colors and room boundaries to keep orientation, and mark isolated platforms that lead to hidden item rooms.
Doors and Barriers
System GuideBlue beam doors, green missile doors, yellow Super Missile doors, and red Power Bomb doors each announce the weapon that opens them, alongside security and story locks.
Metroid Fusion Endings and Unlockables
Metroid Fusion records item collection and clear performance separately. Completion-focused players can sweep the station for expansions, while speed-focused players can optimize the critical route — the ending presentation reflects both.
Standard Story Clear
Defeat the final boss with no time or collection requirements. The standard ending plays and the completed save can be replayed with completion tracking intact.
Improved Completion Clear
Finish with a higher share of Energy, Missile, Super Missile, and Power Bomb Tanks collected. A higher percentage changes the ending presentation compared with a low-collection clear.
Fast Clear
Complete the story while minimizing detours, using the in-game clear time as the benchmark. Time targets are tracked separately from item percentage.
High-Completion Speed Challenge
Collect nearly every expansion while still clearing the game quickly. Leave difficult expansion rooms for the late game, when the full ability set reduces traversal friction.
100% Item Completion
Collect every Energy Tank, Missile Tank, Super Missile Tank, and Power Bomb Tank for the highest completion result and its corresponding ending presentation.
Metroid: Zero Mission Link Feature
Original GBA hardware supports a link feature between Metroid Fusion and Metroid: Zero Mission. It is a historical cross-game bonus, separate from Fusion's own endings.
Metroid Fusion Cheats, Codes and Secrets
Metroid Fusion has no password-entry code system — its secrets are movement techniques, hidden passages, and sequence tricks built into the game itself. Each entry below is labeled by its source.
No Built-In Password System
There is no password screen for item or progression codes. Save files, mission progression, and item collection are the intended systems.
Shinespark
Build Speed Booster momentum, crouch to store the charge, then release it with a direction to smash speed blocks and reach distant platforms.
Bomb Jump
Chain bomb explosions while in Morph Ball to lift Samus up shafts that a normal jump cannot clear.
Wall Jump
Press jump while touching a usable wall to rebound and gain height — it improves vertical traversal and shortens some routes.
Hidden Blocks and False Dead Ends
Many rooms hide passages behind destructible blocks, Morph Ball tunnels, and missile or Power Bomb blocks. Test suspicious floors, ceilings, and corners.
Sequence Breaking
Precise Shinespark setups, wall jumps, and unusual routing can reach some areas earlier than intended — a favorite tool of challenge runners.
Sector Security Doors
Security Rooms raise the station's door authorization level. Reaching each Security Room during its mission opens a new class of doors without any external code.
Metroid: Zero Mission Link
Original GBA hardware can link Metroid Fusion with Metroid: Zero Mission for documented cross-game bonuses — a console feature, not an in-game code.
External Cheat-Device Codes
Action Replay and GameShark codes can alter health, ammo, and progression, but they are device-specific modifications, not part of the game itself.