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The Ball Slug is a spherical tank developed by the Regular Army, exclusive to Metal Slug Attack. It first made its debut on the game's event titled 'Try Line 1st', where the slug/boss can also become a playable unit.

Information

A spherical tank developed with the latest technology available to the Regular Army. Popular within the army for its round, lightweight form and surprising maneuverability, but it fights dirty: attacking the enemy by stomping on them or shooting out light orbs in all directions, with no blind spots. The cockpit shakes a lot, so only a few people can pilot it.

~Metal Slug Attack in-game description.

Gameplay

In Metal Slug Attack's event, this boss is fought at the last stage. The slug will use its double cannon to attack the player, when the player's unit gets closer, it rams it down with its spherical wheels. The player must be extremely cautious as the slug is capable of dishing out extremely powerful damage per seconds with all of its attack, so using blockers are highly recommended to deal with it.

At some time when its special attack is ready, the slug jumps then hovers in the air to rain down energy beams, and when an attack causes it to be knocked back, it closes its shell before bouncing against the player's units three times. Both of these attacks are practically annoying, as they both block projectile at the same time provide the slug with invulnerability frames, making it notorious for its exceptional stalling capabilities.

Variants

Ball Slug MSA idle
Ball Slug MKI - The very first and original version.
Ball Slug MKII MSA idle
Ball Slug MKII - An upgraded version of the predecessor which is also painted in color blue. It lacks long-ranged attacks in an exchange to powerful melee attacks and is much more focused on close quarters combat. It uses the MKI's counterattack as its own special attack. It is ridden by Clark.

Gallery

Vehicles
Mechanized SV-001 (Metal Slug) | SV-001 Type-R | Slug Copter | Slug Flyer | Slug Sub | Astro Slug | Slug Gunner | Slugnoid | LV Armor | Walking Machine | Slug Mariner | Drill Slug | M-15A Bradley | Metal Claw | Forklift | Slug Mobile | Augensterm | Protogunner | Slug Digger | Slug Trolley | Slug Armor | Slug Gigant | Golden Slug | MS-Alice | Ball Slug | Slug Square
Animal SV-Camel | Elephant Slug | Ostrich Slug | Donkey Slug
Other Middle-Son 1986 | Middle-Son 1999 | SV-002 | Borobune Slug | Motorcycle | Parachute Drop | Drop Pack | Regular Army Helicopter | Landseek | PA33-21 Boat | RA-TTT | Rootmars
Bosses
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) | Allen O'Neil | Dai-Manji

Metal Slug 3 Huge Hermit | The Ten Commandments of Moses | Jupiter King | Sol Dae Rokker | Rootmars

Twin Ohumein-Conga | Monoeyes | Hairbuster Riberts | Hi-Do | Rugname

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 | Wall Crawler | Sand Marine | Evil Spirit Incarnate

Black Hound | Stone Turtle (unused) | Mammoth Tower | Ptolemaios (unused)

Metal Slug 6 Bull Drill | Iron Sentinel | Brain Robot | Sea Worm | Invader Queen

Invader Controller

Metal Slug 7/XX Worm Mecha | Crablops | Destroyed Crablops | Fall Mecha | The Union | Rebel Gigant | Kraken
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 | Gunslinger | Rebel Submarine | Rebel Airplane | Hilde Garn's Slug | Rocket UFO

Rebel Rocket | Hyakutaro

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

Allen Jr.

Metal Slug 3D M-3 Rocket Launch Support Van | Mosque Artillery | Spider-Bot | Underground Cruise Missile | Morden's Battleship | Morden's Castle | Allen O'Neil | Lugus | Lieu
Metal Slug Attack Pharaoh's Arc | Ball Slug | Great Mother | K-O3 Coupled Armored Vehicle | Land Blowfish | Cyclobster | Slug Square | Zoni Doloma
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