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Metroid Fusion - SA-X ROM

Metroid Fusion - SA-X rom
When focusing on the main objectives, Metroid Fusion - SA-X is about 25 Hours in length. If you're a gamer that strives to see all aspects of the game, you are likely to spend around 35 Hours to obtain 100% completion.

Metroid Fusion - SA-X is a GBA ROM Hack by LimitedSlipDev based on Metroid Fusion in English. Replaces playable Samus with the SA-X's actual Power Suit body across the whole game, and rebuilds her arsenal to match, every movement upgrade and the suit keeps the SA-X's colors through the entire game, exactly like the real thing.

You can download the Metroid Fusion - SA-X rom on this page and to play the game you need to download the Visualboy Advance Emulator here.

Mario’s Carnival Quest is a mod of Mario Party Advance to give the game a more fitting title, with a few quality of life tweaks added on top!You need to download and install Visual Boy Advance and then load the rom.

For detailed instructions per device, view below.

Download the official Metroid Fusion – SA-X ROM in the (USA) version for the Game Boy Advance handheld consoles. To fully utilize a GBA ROM game, use our Cheats, Rom Hacks and GBA Roms sections. You can open the Metroid Fusion – SA-X ROM or GBA file by Installing VisualBoyAdvance on Windows, MAC, Linux, Android or IOS/iphone.

Additional Information

Metroid Fusion – SA-X is a GBA ROM Hack by LimitedSlipDev based on Metroid Fusion in English. It was last updated on July 16, 2026.

Also, be sure to check out Super Mario Galaxy GBA.

Description

Replaces playable Samus with the SA-X’s actual Power Suit body across the whole game, and rebuilds her arsenal to match: the full SA-X loadout from frame one — Ice Beam with the SA-X’s own sounds, a 250-damage charged Hyper shot, every movement upgrade — and the suit keeps the SA-X’s colors through the entire game, exactly like the real thing.

What’s changed

The suit

  • Nearly every pose in bulky-shoulder shape (SA-X native art, ZM Full Suit imports, and TheMa-x sheet art) — including full aim matrices (standing, mid-air, crouch, ladder) in native left/right art so the cannon stays on the correct arm, and true vertical aim sprites (the SA-X has no vertical-cannon art anywhere in the ROM; those come from the sheet). Only the ceiling-ladder set stays Fusion-silhouette — no fitting art exists.
  • Cutscenes are SA-X too: save/recharge/nav stations, the ability download, and the save-load materialize (ZM bulk-suit sprite, with the vanilla pixel-dissolve effect preserved) — done via in-place blob reskins that keep the cutscenes’ fixed tile budgets byte-identical.
  • Fan-art poses are quantized and injected (injected_sprites.json + sheet cells at build time): crouch set from SemiJuggalo’s expanded sheet; ladders, vertical aim, neutral fall, and the front-idle breathing cycle from TheMa-x’s complete SA-X sheet.
  • The suit never changes color. Varia/Gravity pickups keep the SA-X’s own palette (the Gravity purple recolor was deliberately dropped in v2.68 — the SA-X doesn’t turn purple, and neither do you).
  • Save/nav/recharge pads play the SA-X’s room-scan idle; dying plays the kneel-down (trimmed before the X-blob mutation frames); getting slashed by the Omega Metroid plays the SA-X’s actual cower.

The loadout (read this — it looks like a bug but isn’t)

  • Everything from frame one. A per-frame stub forces the full SA-X arsenal into your live equipment: all five stacked beams, missiles, supers, bombs, power bombs, and the whole movement suite. The story’s download events themselves are untouched, so triggers still fire.
  • Upgrade-guardian bosses still spawn — because the hack withholds that one boss’s item while you’re in its sector until you’ve actually earned it. Walk into Sector 2 and Hi-Jump drops out of your inventory until Zazabi is down; that’s the gate working, not a glitch. Every guardian is location-gated this way (Main Deck ones room-precise).

The beam

  • The SA-X boss is killable (it isn’t, with vanilla ice!): per the metroidret/mf decomp, its weakness is WEAKNESS_CAN_BE_FROZEN only, and every ice damage path gates on CHARGE_BEAM|BEAM_BOMBS — so ice-flagged shots deal zero to it. One data byte (0x2E57D2: 0x40 → 0x41) adds the charge-beam weakness. Bonus: you can freeze the SA-X with its own beam.
  • Charged shot = Hyper Beam: 250 damage, no freeze, SA-X super-missile boom.
  • SA-X sounds, vanilla charging: uncharged fire plays the SA-X ice beam sound, charged fire the SA-X explosion; the charge-up loops are vanilla (earlier versions remapped the charging sound IDs by mistake — sounded like the SA-X firing on full-auto).
  • Screw attack uses the SA-X’s green-spiral sprite + sound; space jump uses the spiral-less spin so the two read differently.
  • Ice/diffusion missiles no longer freeze (the beam owns freezing now).

Known issues

  • The 30Hz beam “ghosting” (the SA-X’s signature flicker) is currently misbehaving and is being reworked.
  • Screw-attack flash/FX still imperfect (native spin art + removed golden arcs is the current state; the authentic electric flicker is in but under review).
  • Ceiling-ladder (horizontal ladder) poses remain Fusion-silhouette.

Useful Links

Reddit

Github

File Name

Metroid Fusion - SA-X

File Size

4.53MB

Version

2.99

Release Date

World: July 16, 2026

Genre

Platformer

Developer

Platform

Game Boy Advance

Region

World

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