MMZ+ZXLC: Boss Weaknesses Guide

The following guide will showcase the weaknesses of Mutos Reploids, Sub-Bosses and Bosses in MMZ1-4, as well as Pseudodroids, Sub-Bosses and Bosses in MMZX and ZX Advent

Overview + A thing to note...

As stated, this guide will showcase the weaknesses of all bosses in Mega Man Zero 1-4, which include Mutos Reploids(Mavericks of the Zero series), sub-bosses and bosses, as well as the weaknesses of all bosses in Mega Man ZX and ZX Advent, which include Pseudodroids (Mavericks of the ZX series), sub-bosses and bosses. I'll do a separate guide for for collectibles for both games series later.

A thing to note is, I am not as familiar with the Zero and ZX games, as I am with Classic and X games, so expect a few, other than grammatical, mistakes here and there. Apologies in advance!

I've also made guides for Classic and X Games, all of which you can check through my profile.

Hope this guide will be helpful to you all!

Yes, I've decided to include both Zero and ZX Guides into one for the sake of convinience...

Rock Man Zero 1/Mega Man Zero 1: Boss Weaknesses

NOTE: The reason I listed elements instead of specific weapons, is because regardless of an attack, if it’s an element, that’s super-effective against the boss, it’ll work. For example: Sage Harpuia is weak to Ice, but it doesn't matter from which weapon, be it Buster Shot, Z-Saber, Triple Chain Rod or Shield Boomerang

Order(at least the one that I used): Intro Stage -> Rescue Reploids -> Destroy Train -> Retrieve Data -> Occupy Factory -> Giant Mechaniloid Invasion -> Find Shuttle -> Find Hidden Base -> Rescue Colbor -> Protect Factory -> Duel in Desert -> Stop the Hacking -> Resistance Base Perseverance -> Neo Arcadia

Giant Mechaniloid Invasion and Resistance Base Perseverance are interludes and appear after Occupy Factory and Stop the Hacking...at least for me, I am not sure when they're supposed to appear...

Pros

Cons

Pretty Easy Order*
Triple Chain Rod before Anubis for convinience

You'll have to backtrack to get all the items(I think...)
Giant Mechaniloid Invasion might be a challenging mission early on

*The reason I say it's easy is because I didn't struggle too much with it. Bosses in MMZ1 are challenging, but really great! Nevertheless,I don't know if an even easier order can be achieved(most likely can, I just don't know it yet)


Bosses:

Boss	Mission/Level	E-Chip Weakness	Gives You
Golem	Intro Stage(Underground Laboratory)	N/A; Z-Saber (In the head)	Z-Saber
Aztec Falcon	Rescue Reploids(Disposal Center)	Ice Chip	Thunder Chip
Pantheon Core/Train Engine Core	Destroy Train(Subway)	Thunder Chip	Cyber Elf
Maha Ganeshariff	Retrieve Data (Underground Laboratory)	Thunder Chip	Cyber Elf + Triple Rod
Guard Orotic	Occupy Factory(Subway)	N/A	Flame Chip
Anubis Necromancess III	Find Shuttle(Desert)	Flame Chip	Cyber-Elf
Blizzard Staggroff	Find Hidden Base(Desert)	Flame Chip	Ice Chip
Sage Harpuia	Rescue Colbor (Subway)	Ice Chip	Cyber Elf
Fighting Fefnir	Duel in Desert (Desert)	Thunder Chip	Cyber Elf
Hidden Phantom	Protect Factory (Subway)	N/A	Cyber Elf
Fairy Leviathan	Stop the Hacking (Desert)	Flame Chip	Cyber Elf
Hittite Hottaid	Giant Mechaniloid Invasion	N/A	N/A
Hanumachine	Defend The Base/Resistance Base Perseverance(Resistance Base)	Thunder Chip	Cyber Elf
Asura Basura	Neo Arcadia Shrine	Thunder Chip	N/A
Herculious Anchortus	Neo Arcadia Shrine	Ice Chip	Cyber Elf
Rainbow Devil	Neo Arcadia Tower	N/A	Cyber Elf
Copy X (1st Phase)	Neo Arcadia Core	Varies	N/A
Copy X (2nd Phase)	Neo Arcadia Core	Ice Chip	Cyber Elf

Not sure, if they can be considered Sub-Bosses. The game treats them as bosses, but they don’t have health bars, so, I’ll treat them as sub-bosses

Sub-Bosses/Others:

Boss	Mission/Level	Weak Against
Metarook	Destroy Train(Subway)	N/A
Pantheon Ace	Neo Arcadia Shrine	N/A

*Recommended weapon doesn’t necessarily mean that it’s the best weapon for that boss/sub-boss. You can beat Fairy Leviathan, for example, with Z-Buster. Z-Saber is a better option though, as it can slIce through her and her attacks rather quickly

Rock Man Zero 2/Mega Man Zero 2: Boss Weaknesses

From what I recall, the same thing about order applies to Zero 2(Have to replay Zero 2 to see if it’s true), so, again: I’ll just list the bosses + sub-bosses, the missions in which they appear, their weaknesses and what they give:

NOTE: The reason I listed elements instead of specific weapons, is because regardless of an attack, if it’s an element, that’s super-effective against the boss, it’ll work. For example: Sage Harpuia is weak to Ice, but it doesn't matter from which weapon, be it Buster Shot, Z-Saber, etc.

NOTE: EX Skills are unlocked by earning an A or S Rank in the stage

Bosses:

Boss	Mission/Level	E-Chip Weakness	Gives You
Mecha Scorpia	Intro Stage (Sand Wilderness)	N/A	N/A
Hyleg Ourobockle	Rescue Reploids (Forest of Dysis)	N/A	Laser Shot (EX Skill)
Poler Kamrous	Destroy Computer (Computer Zone)	Flame Chip	Ice Chip + Triple Shot (EX Skill)
Panter Flauclaws	Rob Goods (Supply Train)	Ice Chip	Thunder Chip + Spark Shot (EX Skill)
Phoenix Magnion	Destroy Power Reactors (Power Room)	Thunder Chip	Flame Chip + Tenshouzan (EX Skill)
Golems	Residential Area	Golem E – Ice; Golem F – Thunder; Golem I - Flame	N/A
Kuwagust Anchus	N/A	Ice Chip	Sengatotsu (EX Skill)
Burble Hekelot	Chase Elpizo (Forest of Notus)	N/A	Energy Chain (EX Skill)
Sage Harpuia	Chase Elpizo (Crystal Cave)	Ice Chip	Kougenjin (EX Skill)
Fighting Fefnir	Chase Elpizo (Shuttle Factory)	Thunder Chip	Blast Shot (EX Skill)
Fairy Leviathan	Chase Elpizo (Roof of Computer Zone)	Flame Chip	Sharp Edge (EX Skill)
Rainbow Devil MK2	Neo Arcadia Temple	N/A	Filter Shield (EX Skill)
Sage Harpuia MK2	Temple of Wind	Ice Chip	N/A
Fighting Fefnir MK2	Temple of Flame	Thunder Chip	N/A
Fairy Leviathan MK2	Temple of Ice	Flame Chip	N/A
Kuwagust Anchus MK2	Teleporting Hatches	Ice Chip	N/A
Elpizo (1st Phase)	Yggdrasil	N/A	N/A
Elpizo (2nd Phase)	Yggdrasil	N/A	N/A

Sub-Bosses/Others:

Boss	Mission/Level	Weak Against
Golem Type E	Intro Stage (Sand Wilderness)	Ice Chip
Pinofeel	Rescue Reploids (Forest of Dysis) + Chase Elpizo(Forest of Notus)	Ice Chip
Golem Type I	Destroy Computer (Computer Zone)	Flame Chip
Golem Type F	Destroy Power Reactors (Power Room)	Thunder Chip
Gazamir	Destroy Power Reactors (Power Room)	Blast Shot

Rock Man Zero 3/Mega Man Zero 3: Boss Weaknesses

NOTE: The reason I listed elements instead of specific weapons, is because regardless of an attack, if it’s an element, that’s super-effective against the boss, it’ll work. For example: Hellbat Schilt is weak to Ice, but it doesn't matter from which weapon, be it Buster Shot, Z-Saber, etc.

NOTE: EX Skills are unlocked by earning an A or S Rank in the stage

Bosses:

Boss	Mission/Level	E-Chip Weakness	Gives You
Omega	Intro Stage (Derelict Spacecraft)	N/A	N/A
Blazin’ Flizard	Neo Arcadia Army Recon (Aegis Volcano Base)	Thunder Chip	Flame Body Chip + Burst Shot (EX Skill)
Childre Inarabitta	Track Dark Elf Signal (Oceanic Highway Ruins)	Flame Chip	Ice Body Chip + Throw Blade (EX Skill)
Hellbat/Devilbat Schilt	Destroy Factory (Weapons Repair Factory)	Ice Chip	Thunder Body Chip + Saber Smash (EX Skill)
Deathtanz Mantisk	Find Dark Elf (Old Residential)	N/A	Light Body Chip + 1000 Slash (EX Skill)
Crea and Plea	Missile Factory	N/A	N/A
Anubis Necromancess V	Engage Neo Arcadian Army (Twilight Desert)	Ice Chip	Shield Sweep (EX Skill)
Hanumachine R	Engage Neo Arcadian Army (Forest of Anatre)	Thunder Chip	Split Heavens (EX Skill)
Blizzard Staggroff R	Engage Neo Arcadian Army (Frontline Ice Base)	Flame Chip	Blizzard Arrow (EX Skill)
Copy X Mk II	Infiltrate Neo Arcadia (Area X-2)	N/A	Quick Foot Chip + Reflect Laser (EX Skill)
Cubit Foxtar	Search Facility (Energy Facility)	Thunder Chip	Double Jump Foot Chip + Soul Launcher (EX Skill)
Glacier le Cactank	Retrieve Data (Snowy Plains)	Flame Chip	Spike Foot Chip + Orbit Shield (EX Skill)
Volteel Biblio	Retrieve Data File (Sunken Library)	Ice Chip	Shadow Dash Foot Chip + V-Shot (EX Skill)
Tretista Kelverian	Search Facility (Giant Elevator)	N/A	Absorber Body Chip + Gale Attack (EX Skill)
Hidden Phantom(Optional)	Sub Arcadia	N/A	Ultima Foot Chip
Crea and Plea (2nd Encounter)	Sub Arcadia	N/A	Ultima Foot Chip
Dark Elf Omega (1st Phase)	Final Mission	N/A	N/A
Fusion Omega (2nd Phase)	Final Mission	N/A	N/A
Omega Zero (3rd Phase)	Final Mission	N/A	N/A

Sub-Bosses:

Sub-Boss	Mission/Level	Weakness
Crossbyne	Neo Arcadian Army Recon (Aegis Volcano Base) and Search Facility (Energy Facility)	Z-Saber
Modified Pantheon Aqua	Track Dark Elf Signal (Oceanic Highway Ruins)	Burst Shot, Buster Shot(Charged), Z-Saber(Charged), Recoil Rod(Charged)
Bee Server and Mellnets	Destroy Factory (Weapons Repair Factory)	Orbit Shield/Blizzard Arrow (Bee Server); Anything, lol (Mellnets)
Megamilpa	Find Dark Elf (Old Residential)	Shield Boomerang, Orbit Shield and Saber Smash
Or Wormer	Engage Neo Arcadian Army (Twilight Desert)	Z-Saber / N/A
Locomo IF	Search Facility (Energy Facility)	N/A
Blanc Wormer	Retrieve Data (Snowy Plains)	Z-Saber
Spearook	Search Facility (Giant Elevator)	Ice Buster Shot(Charged)

Rock Man Zero 4/Mega Man Zero 4: Boss Weaknesses

NOTE: The reason I listed elements instead of specific weapons, is because regardless of an attack, if it’s an element, that’s super-effective against the boss, it’ll work. For example: Mino Magnus is weak to Ice, but it doesn't matter from which weapon, be it Buster Shot, Z-Saber, etc.

Suggested Order (according to StrategyWiki to minimize backtracking):
Noble Mandrago -> Heat Genblem -> Popla Cocapetri -> Fenri Lunaedge -> Mino Magnus -> Sol Titanion -> Tech Kraken -> Pegasolta Eclair

NOTE: Requirements to unlock EX Skills have changed:

Burning Shot, Time Stopper, Flame Fang, Shy Chaser are unlocked by defeating the boss in a sunny weather
Tractor Shot is unlocked by defeating the boss in a stormy weather
Ice Blade is unlocked by defeating the boss in a snowy weather
Thunder Stab is unlocked by defeating the boss in a cloudy weather
Ice Javelin is unlocked by defeating the boss with an A/S Rank

Bosses:

Boss	Mission/Level	E-Chip Weakness	Gives You
SubDesert Core	Intro Stage	N/A; Charged Z-Saber	N/A
Carnage Force 0	Area Zero	N/A	N/A
Sol Titanion	Halt the Sun (Artificial Sun)	Thunder Chip	Burning Shot (EX Skill)
Tech Kraken	Stop the Drill Sub (Deep Sea)	Flame Chip	Ice Javelin (EX Skill)
Pegasolta Eclair	Stop the Acid Rain (Hanging Gardens)	Ice Chip	Thunder Stab (EX Skill)
Fenri Lunaedge	Destroy the Enemy (Hibernation Chamber)	Flame Chip	Ice Blade (EX Skill)
Popla Cocapetri	Living City	N/A	Time Stopper (EX Skill)
Mino Magnus	Halt the Factory (Magnetic Zone)	Ice Chip	Tractor Shot (EX Skill)
Heat Genblem	Cut the Power (Particle Beam)	Thunder Chip	Flame Fang (EX Skill)
Noble Mandrago	Stop the Erosion (Underground Forest)	N/A	Sky Chaser (EX Skill)
Craft	N/A + Ragnarok Control Room	Sky Chaser/Thunder Stab	N/A
Hell the Giant	Save Neige (The Prison)	N/A	N/A
Randam Bandam	Teleporter Base	Tractor Shot	N/A
Cyball	Teleporter Circuit	N/A	N/A
Dr. Weil (1st Phase)	Ragnarok Core	N/A	N/A
Dr. Weil (2nd Phase)	Ragnarok Core	Burning Shot	N/A

Sub-Bosses:

Sub-Boss	Mission/Level	Weakness
Tyrine and the Eight GlassCannons	Halt the Sun (Artificial Sun)	Z-Saber(Charged)/Tractor Shot (Tyrine); Tractor Shot/Z-Saber(Charged)/Ice Javelin/Burning Shot(GlassCannons)
Spy Larue F	Cut the Power (Particle Beam)	Z-Saber(Charged)/Buster Shot(Charged)
Fire Renant	Stop The Erosion (Underground Forest)	Z-Saber(Charged)/Flame Fang/Ice Blade/Sky Chaser

Rock Man ZX/Mega Man ZX: Boss Weaknesses

Order (According to MMHP): Locate Giro -> Pass the Test -> Mavericks Detected -> Search the Plant -> Save the People -> Fight the Mavericks -> Find the Survivors -> Defend Grand Nuage (Prometheus) -> Secure the Biometal -> Protect the Lab -> Attack the Excavators -> Recover the Disk -> Stop the Dig -> Repel the Army -> Destroy Model W -> Area N

NOTE: The reason I listed elements instead of specific weapons, is because regardless of an attack, if it’s an element, that’s super-effective against the boss, it’ll work. For example: Hivolt the Raptoroid isn’t just weak to specific Ice-specific attacks from bosses. No, he’s weak to Ice, period. So, any Ice attacks will kill him in no time.

Bosses:

Boss	Mission/Level	E-Chip Weakness	Gives You
Giga Aspis	Intro Stage/Catch the Maverick (Area A)	N/A	N/A
Rayfly	Locate Giro (Area B)	N/A	N/A
Girouette	Mavericks Detected/Troop Reinforcement (Area D)	N/A	Biometal Z/Model ZX
Hivolt the Raptoroid	Search the Plant (Area E)	Ice	Model HX – 1st Half
Lurerre the Abysroid	Find the Survivors (Area F)	Fire	Model LX – 1st Half
Fistleo the Predatoroid	Fight the Mavericks (Area G)	Thunder	Model FX – 1st Half
Purprill the Mandroid	Secure the Biometal (Area H)	N/A	Model PX – 1st Half
Hurricaune the Wolveroid	Save the People (Area I)	Ice	Model HX – 2nd Half
Leganchor the Gelroid	Recover the Disk (Area J)	Fire	Model LX – 2nd Half
Flammole the Moleroid	Attack the Excavators (Area K)	Thunder	Model FX – 2nd Half
Protectos the Goreroid	Protect the Lab (Area L)	N/A	Model PX – 2nd Half
Prometheus	Defend Grand Nuage (Area X)	Thunder	N/A
Pandora	Stop the Dig (Area M)	N/A	N/A
Prometheus + Pandora	Repel the Army (Area O)	Thunder(Prometheus); N/A(Pandora)	N/A
Serpent (1st Phase)	Destroy Model W (Area D)	N/A	N/A
Model W (2nd Phase)	Destroy Model W (Area D)	N/A	N/A
Omega (Optional)	Area N	N/A	Model OX

Sub-Bosses:

Boss	Mission/Level	Weak Against
King Flyer	Mavericks Detected/Troop Reinforcement (Area D)	N/A
Crushpactor	Search the Plant (Area E) + Find the Survivors (Area F)	N/A
Powmettaur	Secure the Biometal (Area H)	N/A
Deluxe Galleon Wing	Defend Grand Nuage (Area X) + Repel the Army (Area O)	N/A
Flying Mechaniloid Types D(Dragon) and O(Orias)	Save the People (Area I)	N/A
Mechanical Eels	Recover the Disk (Area J) + Repel the Army (Area O)	N/A
Lava Demon	Attack the Excavators (Area K)	Thunder
Flying Mechaniloid Types E(Eagle)	Stop the Dig (Area M)	N/A

Rock Man ZX Advent/Mega Man ZX Advent: Boss Weaknesses

NOTE: The reason I listed elements instead of specific weapons, is because regardless of an attack, if it’s an element, that’s super-effective against the boss, it’ll work. For example: MM Thetis isn’t just weak to, say, MM Atlas’ attacks. No, he’s weak to fire, period. So, MM Atlas’ or Buckfire’s attacks will kill him in no time.

Order: WIP

Bosses:

Boss	Mission/Level	E-Chip Weakness	Gives You
Dogu the Giant	Mysterious Lab 2(Grey) [Intro Stage] / Raider Pursuit(Ashe) [Intro Stage]	N/A	N/A
Buckfire the Gaxelleroid	Train	Thunder	Buckfire’s Data
Rospark the Floroid	Tower of Verdure	Ice	Rospark’s Data
Chronoforce the Xiphosuroid	Arctic Ice Floe	Fire	Chronoforce’s Data
Mega Man Atlas	Oil Field	Thunder	Model F’s Data
Mega Man Siarnaq	Legion Headquarters	N/A	Model P’s Data
Mega Man Thetis	Highway	Fire	Model L’s Data
Mega Man Aeolus	Floating Ruins	Ice (NOTE: Immune to Fire)	Model H’s Data
Vulturon the Condoroid	Scrapyard	N/A	Vulturon’s Data
Queenbee the Hymenopteroid	Control Center	Thunder	Queenbee’s Data
Model ZX: Aile (as Grey)/ Model ZX: Vent (as Ashe)	Quarry	N/A	Model ZX’s Data
Bifrost the Crocoroid	Bio Lab	Fire	Bifrost’s Data
Hedgeshock the Erinaceroid	Mysterious Lab	Ice	Hedgeshock’s Data
Argoyle + Ugoyle the Shisaroids	Waterfall Ruins	N/A(Pandora)	Argoyle + Ugoyle’s Data
Prometheus + Pandora	Undersea Volcano	N/A	N/A
Master Albert (1st Phase)	Ouroboros	N/A	N/A
Master Albert (2nd Phase)	Ouroboros	N/A	N/A

Not sure, if they can be considered Sub-Bosses. The game treats them as bosses, but they don’t have health bars, so, I’ll treat them as sub-bosses

Sub-Bosses/Others:

Boss	Mission/Level	Weak Against
Spidrill	Tower of Verdure - 2	N/A
Langbrach/Sucker Arms	Arctic Ice Floe - 2	N/A
Desert Aspis	Oil Field - 2	Electric
Circrush	Highway - 3	N/A
Cankerfly	Highway – 4(?)	N/A
Capsule Converter	Control Center - 2	N/A
Crushpactor DD	Quarry - 3	N/A
Spidrill Neo	Quarry - 4	N/A
Giganto Bole	Waterfall Ruins - 4	Thunder

[Bob of Mage]

I think you need to do something like half the missions, and then it will trigger the drill attack. Doing the rest will trigger the base invasion.

It should also be noted that doing the mission where you return to the area where Zero was revived to get the data, and unlock your new weapons, will trigger the area to be sealed off. So it is best to revisit that area in the free wandering mode, and garb all the elves and such first.

[Bob of Mage]

Honestly it is pretty easy to figure out most bosses' weakness thanks to the rock-paper-scissors thing going on with the elements. Fire beats ice, ice beats thunder, and thunder beats fire.

In Zero 1, you can actually skip to the endgame by failing certain missions. Basically failing a mission that is about defending the base from something, will trigger the base attack mission early. Of course failing missions will result in you losing out on any of their loot which will gimp you for the end levels.

Also in Zero 1, some levels only unlock after you have done earlier missions in those areas. For example you need to do the first desert mission to unlock the underground base mission, since it starts in the desert area. Generally you will face a normal boss in said area, and then the second mission will be facing one of the four guardians (that's what they were called I think).

[PLMMJ]

Wait, Desert Aspis HAS A WEAKNESS?!

Also, I don't think that Ice Javelin requires an A or S rank, I think I had a B rank going into that level and still got it because weather snowy.

[Shmooooey]

@Desticler
For Z2 + Z3: Huh, I didn't know that! Thank you for that tidbit of info!
For Z4: Yeah, you're right! I just wrote it for the sake of informing people; Ice Javelin requires an A/S rank, though

[Desticler]

Correction:
For Z2 and Z3, EX skills are earned by having A/S rank while entering a stage, not for getting it in the mission itself. For example, if you enter a stage with A rank, but finish it with B rank, you will still get the EX skill because you had A rank when entering it. The opposite will not work.
In Z4, all EX skills are earned by having "hard" weather (when the weather icon's border flashes red and yellow), so you don't have to remember exact weather for each stage, just look at the border. Your rank doesn't matter at all when it comes to EX skills in Z4.

[Shmooooey]

My b! Thanks!

[sam caulk]

Pros:
Pretty Easy Order*
Triple Chain Rod Before Anubis for
Convinient Reach

Cons:
You have to Backtrack to Get all Items (I think)
Gaint Machaniloid Invasion might be a |challening| Mission Early on

There's a Small Spelling Error in the Cons.

[Skyfox]

Best guide ever for a game like this. Thank you! =D

[jirachifan9000]

It was prob imported but still very useful nonetheless, thanks!

[sam caulk]

Welp.