Xenoblade Chronicles Definitive Edition

Chapter 15: Mechonis Core Walkthrough

This is a walkthrough for the Mechonis Core section of Xenoblade Chronicles Definitive Edition for Nintendo Switch. For a map of Mechonis Core Landmarks and Locations, as well as boss strategy and other tips and tricks, read on!

Chapter 15: Mechonis Core Walkthrough

Fallen Arm

1 Head Inside Junks.
2 Talk to Miqol and ask him to take you to the Mechonis Core.

Central Factory

Optional Complete “A New Weapon for Fiora” quest.
This is the only quest available during this chapter, and you can strengthen Fiora if you plan on adding her to your main roster.
1 Follow the quest guide until you reach the bridge to the Apocrypha
You'll be walking on a thin pipe line. Avoid walking in zig zags or jumping.
2 Defeat the Apocrypha Generator.
3 Defeat Yaldabaoth.

Side Quests

The following side quests are available from this chapter:

Central Factory Side Quests

Quest Location Giver Rewards
New Weapon for Fiora Ventillation Conduit Junks Staff 29500 G
32000 EXP
War Blades

Quests in Red Text indicate Timed Quests. As these quests will expire after progressing to a certain part of the game, be sure to complete them while they are still available!

Maps and Collectopaedia

Mechonis Core Map

Mechonis Core Landmarks and Locations




1 Mechonis Core


There are no available Heart-to-Hearts in this area.

Mechonis Core Collectopaedia

There is no collectopaedia in this area.

Tips and Strategies

Vision Timer

Vision Timer
You will notice that there is a number located on Shulk's vision. This indicates the seconds left until his vision becomes a reality. This will be incredibly useful for the last boss of this chapter.

Boss Strategy Guide

Apocrypha Generator

Apocrypha Generator
Similar to Gadolt, the Apocrypha Generator's main line attack consists of Ether-based moves. It can use Laser, which can deal around 2000-3000 damage to a single target, and it inflicts topple as well. Watch out for Great Laswer VI, and always ready your Talent Art Shield to block it. Also make sure to not let Apocrypha's aggro target you, so you can focus all your healing abilities on your tank.

Apocrypha Generator Recommended Characters

Shulk IconShulk Dunban IconDunban Riki IconRiki

The Apocrypha Generator has a high amount of HP, and also has access to strong Ether Attacks. Shulk, Dunban, and Riki is the best set up against Apocrypha, due to their high Ether Defense and damaging abilities. Use Warn on Dunban, and let him take the Aggro if the Generator targets a different party member by selecting Blinding Blossom.

Yaldabaoth (Mechonis Core)

He's going to be immovable through the fight. You can only hit him in the front, so don't waste your time trying to circle the map to increase the effects of Shulk's Chain Arts. He will also summon several Mechons during the fight, so eliminate them once they appear. You can take the opportunity to fill the party gauge.

Make sure to always stay in range against Yaldabaoth (except when dispatching summoned mechons), as he can use Chastise, which will seal your movement, stopping you from attacking him if you're out of attack range.

Bionis Slash X

Bionis Slash X
When you see a vision of the Bionis Slash X, immediately stop all attacks against Yaldabaoth, and focus on the three generators summoned on the area surrounding him. Do not panic, you have 2 minutes to destroy the generators, which should be more than enough.

Yaldabaoth Recommended Characters

Shulk IconShulk Dunban IconDunban Sharla IconSharla

Switch Sharla in for this fight. Her healing is needed against Yaldabaoth's heavy damage. You're also going to need Dunban to quickly eliminate the Mechons that gets summoned in the fight.

Story Walkthrough Related Links

Xenoblade Chronicles Story Walkthrough

Prologue The Battle of Sword Valley
Chapter 1 Colony 9 and Tephra Cave
Chapter 2 Colony 9 (Mechon Invasion)
Chapter 3 Tephra Cave (Revisited)
Chapter 4 Bionis' Leg
Chapter 5 Colony 6 and Ether Mine
Chapter 6 Satori Marsh and Bionis' Interior (1st Time)
Chapter 7 Makna Forest and Frontier Village
Chapter 8 Eryth Sea, Alcamoth, and High Entia Tomb
Chapter 9 Prison Island (1st Time)
Chapter 10 Valak Mountain
Chapter 11 Sword Valley and Galahad Fortress
Chapter 12 Fallen Arm
Chapter 13 Mechonis Field
Chapter 14 Central Factory and Agniratha
Chapter 15 Mechonis Core
Chapter 16 Central Factory (Revisited)
Chapter 17 Bionis' Interior and Prison Island (Revisited)
Final Boss Memory Space


    Walkthrough Menu

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