Metal Slug Wiki
Metal Slug Wiki

The Perfect Jupiter King is the penultimate weapon of the Rebel Army, exclusive to Metal Slug Attack. It first made its debut in the game's mode known as the 'Ultimate Mission', where the boss can also become a playable unit.


"An ultimate weapon developed by the Rebel Army. It is meant to deal a decisive blow that will shift the tide of war, and bring an end to this long drawn-out fierce battle. It has the ability to hasten the attack of all its allies. Gen. Morden and Sergeant Allen are aboard."

~Metal Slug Attack in-game description.


The Perfect Jupiter King is a giant mech, based on the Jupiter King. True to its name, it features a much more robotic appearance than its predecessor. Due to the sprites' gigantic size, the upper torso has been cut off screen although it can be seen while performing its special attack or during second form.

In Metal Slug Attack's game mode, it is fought on the Rebel's Ultimate Mission, the boss is not fought until a set time has passed. Once upon deployment, it will be spawned on the player's nearest units while also activating the Rebel's Ultimate Skill, an Attack fever skill which allows the Rebel Army units' special attacks to recharge instantly for a short period of time.

As its primary attack, the Perfect Jupiter King will stomp the enemies with its large foot. For its special, it will charge its fist to punch the ground to deal massive damage. Once upon taking severe damage, the Perfect Jupiter King's legs will be destroyed, leaving the upper torso intact. This prompts Sergeant Allen to use his superhuman strength to lift the mech's body, essentially transitioning to its second form.

In this second form, the Perfect Jupiter King moves rather sluggish but can perform formidable attacks that should not be underestimated. As its primary attacks, it will unleash flurries of punches to deal rapid damage over time. As its special attack, it will use its arm cannon and eye laser against the enemies.

As a playable unit, the Perfect Jupiter King is extremely expensive, requiring immense amount of unit parts to remedy its vast AP cost. Not only its AP but also its unique items which forces the player to spend their sorties for Extra Ops and Guild Ops as its Ultimate Parts can be found there for its skills.


Metal Slug Attack
Main Characters Marco Rossi | Eri Kasamoto | Tarma Roving | Fio Germi | Donald Morden | Allen O'Neil | Abigail | Ptolemaios | Dragunov | Yoshino | Professor | Red Goblin
Factions Regular Army | Rebel Army | Ptolemaic Army | Space Army (Martians | Invaders) | Independent (Amadeus Syndicate | Mummy Army)
Sub-Groups Metal Device Project | Blaze Brigade | Frozen Brigade | ACE | Mutants | Believers | Mars People Rangers | Metzeleis | Valerian Bears | Red Goblin Society | Vampires | Yuki Tsuki Hana | World Military Corp.
Other List of Metal Slug Attack Characters
Vehicles and Slugs
Regular Army Slug Attacker | Slug Defender | Slug Rising | TS-001 | Ball Slug | Giant Copter | Slug Square | Tiger Slug | Coil Tank | Tail Slug | Ashley's Slug Flyer | Patrol Slug
Rebel Army Iwa Oh | Julia's MV-280 | Naglfar | Denturion | Alesha's Bike | Armed Tiltrotor | Vicky's Sarubia | Dolores' Sarubia | Nantes' Tank | Emma's Recycle Box | Loretta's Blaze Vortex | Marinesk
Ptolemaic Army D-001 Tanbal | Towa's Mech | GIP-03 Bergenia | Snordon | Glidron | Humphrey's Hoverboard | Hammer DX5005
Space Army Mars Gigantalos | Mars Sweeper | Purple King | Leone's Shoe | Pauline's Mech
Independent Army El Dorado's Slug Armor | Minerva's Ostrich | Maya's Excavator | Kagura's Samurai Mech | Sharifa's Golem
MS-Alice | MS-Heart | Wade | White Baby | First Baby | Iron Fortress | Machyna | Type:Ant-Lion
Extra Ops Ptolemaios | Sky Jupiter King | Doctor Type: AI
Recapture Mega Drill Slug | Queen Big Snail | Riviere Hyll | Gaia Elephant | Metal Fusioner No.223
Try Line Ball Slug | Great Mother | K-O3 Coupled Armored Vehicle | Land Blowfish | Cyclobster | Slug Square | Zoni Doloma | Quadro Jumper | Fortmeranian | Giant Copter | Flying Hermit | Et A Omnis | Element Giant | Mini-Bata | Digger Base | Screamer | Airborne Denturion | Mass Production Tail Slug | Slug Striker | Arms Copter
Task Force Rock Mole | Elder Centipede | Runaway Brain Robot | Master Kraken | D-Gu | Astro Slug | Monoeye Gate | Crusty Legs | Armored Crawler | Clone Incubator | 7000 Class Locomotive | Frozen Vortex
Ultimate Mission Golden Slug Phoenix | Perfect Jupiter King | Avatar of Evil | Invader King | Celestial Ruler Rokker
Metal Slug Tetsuyuki | Hairbuster Riberts | Tani Oh | Shoe & Karn | Iron Nokana | Hi-Do

Mini-Bata | Allen O'Neil

Metal Slug 2/X The Keesi II / Iron Nokana MK II (X) | Aeshi Nero | Dragon Nosuke | Big Shiee | Hozmi | Rugname

Mosque Artillery | The Keesi II (X) | Karn (X) | Allen O'Neil | Dai-Manji

Metal Slug 3 Huge Hermit | Monoeye UFO | Jupiter King | Sol Dae Rokker | Rootmars

Twin Ohumein-Conga | Monoeyes | Hairbuster Riberts | Hi-Do | Rugname | Fake Rootmars | Clone Incubator

Metal Slug 4 Brave Guerrier | Toschka Dalanue | The Iron | Big John | Sea Satan | Amadeus Mother Computer

Mecha Allen O'Neil

Metal Slug 5 Metal Rear | Shooting Ray | Screamer | Sand Marine | Avatar of Evil

Black Hound | Stone Turtle (unused) | Gaia Elephant | Ptolemaios (unused)

Metal Slug 6 Bull Drill | Iron Sentinel | Brain Robot | Elder Centipede | Invader King

Invader Controller

Metal Slug 7/XX Worm Mecha | Crablops | Destroyed Crablops | Fall Mecha | The Union | Rebel Gigant | Kraken

Scrap Tower | Big Gate

Metal Slug: 1st Mission Rebel VTOL | Rebel Train | Macba | Rebel Zeppelin | Electromagnetic Crane | Weapons Port Boss | Hilde Garn

Facility Elevator | Macba | Rebel Truck

Metal Slug: 2nd Mission Big Bertha | Terrain Carrier | Rebel Reactor | Macba | Rebel Submarine | Tani Oh | Wired | Rebel Airplane | Hilde Garn's Slug | Rocket UFO

Power Generators | Rebel Rocket | Hyakutaro

Metal Slug Advance Formor | Emain Macha | Kaladgolg | The Keesi III | Cabracan

Allen Jr.

Metal Slug 3D Parachuetruck | Mosque Artillery | Spider-Bot | Underground Cruise Missile | Morden's Battleship | Morden's Castle | Allen O'Neil | Lugus | Lieu
Metal Slug Attack Pharaoh's Arc | Ptolemaios | Ball Slug | Great Mother | Mars Gigantalos | K-O3 Coupled Armored Vehicle | Land Blowfish | Cyclobster | Slug Square | Zoni Doloma | Quadro Jumper | Denturion | D-Gu | Fortmeranian | Rock Mole | Giant Copter | Et A Omnis | Vortex | Digger Base | Crusty Legs | Armored Crawler | Queen Big Snail | 7000 Class Locomotive | Riviere Hyll | Metal Fusioner No.223
Mobile games Rocket Control Room | Unknown Alien | Hellfire | Spiderbot | Cyclops | Mega Laser Turret | Mars Battle UFO | M-32 Water Carrier Plane | Kourai | Alien Floating Structure