Metroid Prime 4: Beyond 100% Walkthrough – Part 13: Boss Battle Sylux and Ending @ShadowMario3
Metroid Prime 4: Beyond 100% Walkthrough – Part 13: Boss Battle Sylux and Ending  @ShadowMario3
Uploaded January 2026 | Updated September 2026, 2 weeks ago
Here is the final part of the walkthrough. I go over the Logbook quickly before meeting up with the Troopers and moving forward with the mission (3:47), which means there is no more going back. After a cutscene plays, we go through Chrono Tower and view Chatoya’s last message (9:09). We eventually reach the top of the Tower, which is the Pinnacle bring the Master Teleporter down (15:25). We try to activate it (17:42), but Sylux interrupts us. As you can see with the skip, my first try didn’t really work out due to how difficult this fight is in Hard Mode.

The Super Thunder Shot is useful due to its limited tracking easily taking out Sylux’s green Nano Arms. However, his elemental arms deal a ton of damage not only to you, but your allies as well, so you’ll need to heal them as soon as they go down or you’ll get a Game Over. One thing to note is you can grapple a maximum of two Nano Arms at a time, so don’t try to leave three in a vulnerable state. When Sylux is vulnerable, throwing a Psychic Power Bomb is useful since it’ll damage the elemental arms when they return as well. However, it seems that laying one beneath him (28:26) seems to deal a lot more damage, The Thunder Head portion is the hardest due to RNG determining if your allies will be in an area where Lightning lands, so you’ll need to watch out for them. Laying another Psychic Power Bomb beneath him (30:57) quickly ends this portion and phase.

The second phase of the battle relies on your aim, but the Super Thunder Shot’s tracking is very useful here as well, so I just spam it until his health reaches 50% and we move on to the final phase (32:42). With this phase, your best friend is the Psychic Beam as long as you manage to keep on landing headshots and make sure to dodge his attacks. If you have enough Shot Ammo, you can use the Super Thunder Shot as well. Eventually, Sylux is finally defeated (41:54), and the Ending + Credits + Post-Credits Ending Play. With that, the walkthrough of this game is finally over. Hopefully we won’t need to wait as long for the next game.

Afterward, I go over the Hard Mode image gallery unlocks (57:59). I will do a couple more Extra Parts, showing off the Image Gallery, the different types of Game Overs, and the amiibo functionality.

Items acquired:
None

Scans acquired:
Sylux (Sylux Forces): (20:00)
Lockjaw (Sylux Forced): (33:44)

Main Item List:

Psychic Crystal [x]
Psychic Glove [x]
Missile Launcher [x]
Control Beam [x]
Psychic Bomb [x]
Vi-O-La Suit [x]
Vi-O-La [x]
Psychic Boots [x]
Fire Chip [x]
Fire Shot [x]
Charged Fire Shot [x]
Psychic Beam Upgrade [x]
Psychic Lasso [x]
Psychic Boost Ball [x]
Ice Chip [x]
Ice Shot [x]
Super Fire Shot [x]
Charged Ice Shot [x]
Vi-O-La IC Suit [x]
Control Beam Boost [x]
Psychic Grapple [x]
Teleporter Chip [x]
Thunder Chip [x]
Teleporter Patches [x]
Thunder Shot [x]
Super Ice Shot [x]
Charged Thunder Shot [x]
Green Energy Crystal Finder [x]
Psychic Spider Ball [x]
Super Thunder Shot [x]
Super Missile [x]
Psychic Power Bomb [x]
Legacy Suit [x]

Expansions:

Missile Expansions: 48/48 *All Missile Expansions obtained*
Energy Tanks: 14/14 *All Energy Tanks obtained*
Shot Expansions: 38/38 *All Shot Expansions obtained*
Large Shot Expansions: 6/6 *All Large Shot Expansions obtained*
Psychic Power Bomb Expansions: 5/5 *All Psychic Power Bomb Expansions obtained*
Vi-O-La Boost Tank: 3/3 *All Vi-O-La Boost Tanks obtained*
Master Teleporter Key: 5/5 *All Master Teleporter Keys obtained*
Mech Part: 6/6 *All Mech Parts obtained*

Logbook:

Biology – Galactic Federation: 6/6 *All Galactic Federation Scans Found*
Biology – Sylux Forces: 4/4 *All Sylux Forces Scans Found*
Biology – Viewros: 53/53 * All Biology – Viewros Scans Found*
Machines – Viewros: 19/19 *All Machines Scans Found*
Lamorn Legacy – Lamorn Lore: 10/10 *All Lamorn Lore Found*
Lamorn Legacy – Lamorn Data Logs: 17/17 *All Lamorn Data Logs Found*
Research: 18/18 *All Research Scans Found*

Chapters:

Start: 0:00
Meetup with the Team: 2:50
Forward to Chrono Tower: 3:47
Chrono Tower: 6:57
Pinnacle: 12:28
Boss Battle Sylux (Phase 1): 17:44
Boss Battle Sylux (Phase 2): 31:05
Boss Battle Sylux (Phase 3): 32:44
Sylux Defeated: 41:56
Activating the Master Teleporter: 43:04
Credits: 47:16
Mission Complete: 54:31
100% Items and Scans Ending: 54:49
Opening: 57:17
Hard Mode Completed Gallery Unlocks: 57:59
Wrapping Up: 1:00:39
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Metroid Prime 4: Beyond 100% Walkthrough – Part 13: Boss Battle Sylux and Ending

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