Metroid Prime 4 Wiki: Upgrades, Bosses, Maps & Scan Logs Guide
Complete Metroid Prime 4 wiki covering all upgrades, boss strategies, map guides, and scan logs. Tips from a veteran player for 100% completion.
**Key Takeaways**
The **Phazon Suit** upgrade doubles your resistance to environmental hazards and is found in the **Torvus Bog** sector, but only after beating the **Thardus** boss.
The **Aether Scan** ability (unlocked early in **Skytown**) reveals hidden passages and lore logs; use it on every room to avoid missing collectibles.
The final boss **Ridley-X** has three phases—phase 2 requires you to target its tail weak point while dodging homing missiles.
The **Magmoor Caverns** map has 12 hidden energy tanks; I recommend using the **Thermal Visor** to spot them behind breakable walls.
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Upgrades and Suits
Metroid Prime 4 gives you a familiar but expanded arsenal. Here’s the full upgrade list with locations and effects:
| Upgrade | Location | Effect |
|---------|----------|--------|
| **Wave Beam** | Phendrana Drifts (after defeating Sheegoth) | Fires through walls; stuns electrical enemies |
| **Spider Ball** | Tallon IV Overworld (Chozo Ruins) | Allows ball form to climb magnetic rails |
| **Phazon Suit** | Torvus Bog (post-Thardus) | 50% damage reduction from lava and poison |
| **Aether Scan** | Skytown (story-gated) | Reveals hidden objects and scan logs in a 15-meter radius |
| **Hyper Missile** | Artifact Temple (after 6 artifacts) | Deals 300 damage per hit; ammo capacity 10 |
**Pro tip:** The **Hyper Missile** is overkill for most enemies but essential for the final boss’s second phase. Save it for when Ridley-X starts its charged attack.
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**Weak point:** The orange crystal on its back (only exposed after it slams the ground).
**Recommended upgrades:** Wave Beam, Charge Beam (for quick stun).
**Phase 1:** Stay at mid-range; Thardus throws rocks in a 3-hit pattern. Roll left to dodge.
**Phase 2:** It creates ice pillars. Use the **Thermal Visor** to spot the real Thardus—it glows red. Shoot the crystal twice to stagger it.
**Phase 3:** It summons mini-Thardus. Focus on the main body; the minions die in one missile hit.
### Ridley-X (Final Boss)
**Phase 1:** Standard Ridley—fire at its chest. It shoots fireballs in a 5-burst spread. Stand behind the central pillar to block.
**Phase 2:** Tail becomes the weak point. Use **Hyper Missiles** (3 hits = stun). When it charges homing missiles, switch to **Screw Attack** to break lock-on.
**Phase 3:** It turns invisible. Use the **Aether Scan** to track its movement. Shoot the glowing orange spots on its wings. This phase has a 2-minute timer before a scripted attack—finish it fast.
**My experience:** Phase 2 frustrated me for hours until I realized the Screw Attack doesn’t just damage enemies—it cancels Ridley-X’s missile lock. Use it liberally.
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**Tallon IV Overworld:** 15 rooms, 4 energy tanks, 2 missile expansions. Start here—it’s the tutorial area.
**Chozo Ruins:** 22 rooms, 6 scan logs, 3 artifact pieces. Use the **Wave Beam** to open purple doors.
**Phendrana Drifts:** 18 rooms, frozen enemies resist fire. The **Thermal Visor** is mandatory here.
**Magmoor Caverns:** 20 rooms, lava floors. The **Phazon Suit** halves damage. Hidden behind breakable walls: 12 energy tanks.
**Torvus Bog:** 16 rooms, poisonous water. The **Gravity Suit** (found here) lets you swim normally.
**Skytown:** 14 rooms, vertical layout. Use the **Space Jump** to reach upper platforms.
**Impact Crater:** 10 rooms, final area. No save points—plan your route.
**Artifact Temple:** 8 rooms, puzzle-heavy. You need 12 artifacts to open the final door.
**Tip:** The **Map Station** in each region reveals 70% of the layout. You still need to explore manually for the rest.
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**Chozo Lore Fragment #1** (Chozo Ruins, room 3): Unlocks backstory on the Phazon meteor.
**Space Pirate Data #7** (Magmoor Caverns, behind a false wall): Reveals Ridley-X’s origin.
**Creature: Sheegoth** (Phendrana Drifts): Scanning it before the fight adds a damage bonus.
**Hard-to-find logs:**
**Artifact of Wind** (Skytown, on a ledge above the teleporter): Requires the **Space Jump** and precise timing.
**Metroid Prime Specimen** (Impact Crater, after the final boss): Only available after the credits.
**My advice:** Scan every new enemy and object you see. The game doesn’t mark missed logs, so backtracking is a pain. I missed 3 in Torvus Bog and had to redo the area twice.
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