- Metroid Fusion 100 percent guide: Finish the story, then clean each Sector with the full movement kit.
- Best approach: Mark blocked rooms early and revisit them after Space Jump, Gravity Suit, and Power Bombs.
- Most missed items: Check Shinespark corridors, hidden Morph Ball tunnels, ceilings, and suspicious dead ends.
- Final warning: Complete optional collection before starting the final evacuation sequence.
Metroid Fusion 100 Percent Guide: Route Planning
Metroid Fusion 100 percent guide planning is easiest when you separate story progression from item cleanup. The B.S.L. station repeatedly sends Samus back through earlier Sectors, so collecting every expansion in a single visit is usually inefficient. Take obvious items during the story, record blocked routes, and perform focused cleanup when new abilities remove several barriers at once.
The main completion targets are Energy Tanks, Missile Tanks, Super Missile Tanks, and Power Bomb Tanks. Major abilities are required for progression, but optional expansions are what determine the final item percentage.
Story Route
Follow Navigation Room objectives and collect required upgrades without taking long detours.
Marked Routes
Remember blocked tunnels, Speed Booster corridors, high ledges, and doors requiring later weapons.
Sector Cleanup
Return with stronger movement tools and clear one Sector at a time instead of wandering.
Final Check
Compare the percentage display with every marked room before entering the last escape route.
| Completion Target | What Counts | Best Cleanup Timing |
|---|---|---|
| Energy Tanks | Optional energy expansions | After Gravity Suit and Space Jump |
| Missile Tanks | Standard missile expansions | During each Sector sweep |
| Super Missile Tanks | Super Missile capacity expansions | After Super Missiles and late movement upgrades |
| Power Bomb Tanks | Power Bomb capacity expansions | After Power Bombs and Gravity Suit |
| Major Upgrades | Story equipment and beams | Collect as the route requires |
Do not force every blocked room immediately. A short note such as “Speed Booster,” “Power Bomb,” or “high jump” is enough to make later cleanup faster.
Step-by-Step Story and Cleanup Route
Use this progression order to reduce unnecessary backtracking. The route follows the intended structure while reserving difficult expansion rooms for a later sweep.
Secure the Early Movement Tools
Explore Sector 1 and obtain the Morph Ball, Missile Launcher, and Charge Beam progression. Check obvious side rooms, but mark any narrow tunnel or high platform that cannot yet be reached.
Open Sector 2 Routes
Visit Sector 2 for Bombs and inspect suspicious floors and Morph Ball passages. Bomb blocks often reveal alternate paths, but do not spend excessive time searching for advanced expansions before the required upgrades are available.
Advance Through the Midgame Sectors
Progress through Sector 3 and Sector 4, collecting the Varia Suit, Hi-Jump Boots, and Speed Booster as the story permits. Use Speed Booster corridors to identify potential Shinespark item routes.
Unlock Late-Game Exploration
Continue through Sector 5 and Sector 6 to obtain Ice Missiles, Gravity Suit, Space Jump, and other late-game equipment. These abilities turn many previously blocked rooms into accessible collection targets.
Perform the Final Sector Sweep
Before entering the Restricted Zone and final evacuation route, revisit every Sector. Clear Morph Ball tunnels, Power Bomb blocks, underwater rooms, high ledges, and Speed Booster puzzles, then confirm the completion percentage.
| Phase | Main Objective | Items to Recheck |
|---|---|---|
| Early route | Learn station layout and unlock basic weapons | Missile doors, Morph Ball passages |
| Midgame route | Gain heat, water, and speed access | Varia Suit gates, underwater rooms, long corridors |
| Late route | Expand movement and weapon access | High ledges, frozen enemies, Power Bomb blocks |
| Cleanup route | Visit every marked room | Tanks, hidden blocks, Shinespark paths |
| Final route | Complete the ending sequence | No optional cleanup should remain |
The final escape sequence is not a normal exploration period. Finish your item sweep before activating the last story route, because returning to regular Sector cleanup may no longer be possible.
Upgrade Gates and Item Locations
A reliable 100% run depends on recognizing which ability opens each type of route. Instead of memorizing every room at once, organize missing items by their most important requirement.
| Ability or Weapon | Exploration Use | Common Collection Gate |
|---|---|---|
| Morph Ball | Enters narrow tunnels and low passages | Small floor gaps and concealed chambers |
| Bombs | Breaks bomb blocks and reveals routes | Hidden floors, walls, and bomb-jump shafts |
| Super Missiles | Opens stronger doors and damages protected targets | Green-door branches and reinforced rooms |
| Speed Booster | Breaks speed blocks and stores Shinespark energy | Long corridors and distant platforms |
| Gravity Suit | Improves underwater movement | Sector 4 water routes and submerged rooms |
| Space Jump | Reaches high and isolated platforms | Vertical shafts and late-game item rooms |
| Power Bombs | Destroys Power Bomb blocks and reveals hidden areas | Large cleanup rooms and concealed passages |
| Screw Attack | Clears special blocks and enemies | Late-game return paths and advanced routes |
Sector-by-Sector Priorities
Main Deck: Recheck elevator corridors, maintenance rooms, and late-game security routes. The central hub is easy to overlook because it serves as a transition area rather than a single large Sector.
Sector 1: SRX: Search natural-looking rooms for missile expansions, narrow passages, and late-game routes connected to stronger movement abilities.
Sector 2: TRO: Bomb blocks, plant chambers, and vertical rooms hide several useful branches. Return with stronger beam upgrades and Power Bombs.
Sector 3: PYR: Check heated maintenance corridors and long rooms that can support Speed Booster setups. Varia Suit access makes this area safer to explore.
Sector 4: AQA: Perform most underwater cleanup after obtaining the Gravity Suit. Slow movement can make early searches harder to read and less efficient.
Sector 5: ARC: Revisit frozen rooms after the Nightmare sequence and inspect areas containing frozen enemies, concealed blocks, and side passages.
Sector 6: NOC: Use the map carefully in darker rooms. High ledges, isolated platforms, and cold-environment routes are common places to miss an expansion.
When a room appears empty, test the floor, ceiling, corners, and isolated platforms. A visible item route may require a weapon or movement upgrade that was not available on the first visit.
Collection Checklist and Efficient Cleanup
The safest cleanup method is systematic rather than random. Start at the Main Deck, select one Sector, and finish its visible item routes before moving to the next. Keep a written list of rooms that require a later ability so you do not repeatedly revisit the same dead end.
100 Percent Completion Checklist:
- Collect every Energy Tank in the Main Deck and six Sectors
- Collect all Missile Tank expansions and revisit missile-door branches
- Collect every Super Missile Tank after the relevant weapon upgrade
- Collect every Power Bomb Tank after unlocking Power Bombs
- Clear all marked Shinespark, Morph Ball, underwater, and high-platform routes
- Finish the final percentage check before entering the evacuation sequence
Shinespark Sweep
Look for long corridors, sudden vertical gaps, and platforms positioned beyond ordinary jumping distance.
Power Bomb Sweep
Use Power Bombs in suspicious rooms, especially where the map shows broad unexplored sections.
Vertical Sweep
Use Space Jump to inspect ceilings, isolated ledges, and shafts that were unreachable earlier.
| Cleanup Problem | Likely Solution | Recommended Action |
|---|---|---|
| A room has no visible exit | Hidden block or Morph Ball passage | Test walls, floors, and low gaps |
| A platform is too high | Space Jump, Hi-Jump, or Shinespark | Mark it and return with the correct movement tool |
| A water route feels too slow | Gravity Suit is missing | Continue the story before attempting full cleanup |
| A large wall seems empty | Power Bomb or weapon block | Revisit after obtaining stronger ammunition |
| Percentage is lower than expected | Missed expansion or unexplored room | Compare the map with your sector checklist |
A high item percentage is not enough to identify the missing location. Use the map, your marked ability gates, and a Sector-by-Sector checklist together for a more dependable final review.
Boss Preparation, Final Review, and FAQ
Boss fights do not directly replace optional item collection, but poor preparation can interrupt a completion route. Recharge before major encounters, save after acquiring important upgrades, and avoid beginning the final story sequence while unfinished collection notes remain.
| Boss or Challenge | Preparation Priority | Useful Reminder |
|---|---|---|
| Arachnus | Missiles and full energy | Attack during exposed openings |
| Serris | Mobility and vertical space | Fire along predictable movement lines |
| Nightmare | Full energy and controlled movement | Adjust to gravity changes |
| B.O.X. | Room positioning | Use recovery windows and arena hazards |
| SA-X | Patience and safe spacing | Early encounters are avoidance sections |
| Omega Metroid | Final equipment and movement | Target the exposed front area |
Q: What does 100 percent mean in Metroid Fusion?
It means collecting every counted expansion, including Energy Tanks, Missile Tanks, Super Missile Tanks, and Power Bomb Tanks, then completing the story.
Q: When should I start the full cleanup route?
Begin the main cleanup after obtaining late-game movement tools such as Gravity Suit, Space Jump, Power Bombs, and the remaining major weapon upgrades.
Q: Which items are easiest to miss?
Shinespark routes, concealed Morph Ball tunnels, high platforms, underwater branches, and rooms hidden behind Power Bomb blocks are common trouble spots.
Q: Can I finish collecting items after starting the final evacuation?
Plan to finish first. The final escape route changes the normal exploration structure, so complete the Sector sweep before committing to the ending.
Before the last mission, save your game, compare the completion percentage with your checklist, and revisit every room you marked for Speed Booster, Space Jump, Gravity Suit, or Power Bomb access.
For official background and platform information, consult the Nintendo Metroid Fusion game page and the Nintendo Game Boy Advance manuals index.