Metal Slug Wiki
Metal Slug Wiki


The Aeshi Nero (alternatively spelt Assy Nero in Metal Slug Attack) is the second boss from Metal Slug 2 and Metal Slug X.


The Aeshi Nero is a gigantic excavating machine resembling a cobra created by the Rebel Army. Although it is primarily designed for burrowing purpose, it can be re-purposed for combat in a pinch.

Although Metal Slug 2/X implies that it is a Martian machine (as Martian-affiliate music plays during the fight instead of the standard boss music, and only supernatural enemies appear throughout the level; it is likely a reference to "alien hunters" who believe the Pyramids were built by aliens). Its description in Metal Slug Attack confirms that it was constructed by the Rebels to clear out room for a base.


The Aeshi Nero is fought in a tower inside a tomb, with it digging through and suddenly appearing from the bottom. Whenever the player climbs, it will also follow them, while launching missiles and electric balls. It will also intermittently charge and fire its laser cannon that will go up the entire tower. The laser is extremely fast, forcing the player to go to the edge of a wooden platform to avoid it. The missiles and electric balls are easy to dodge, but the fact that the player is in a limited space and can fall to their doom if one is not careful tends to make this boss a bit hard. Also, it may suddenly crawl up and electrocute the player with energy sparks, so keep on jumping up.

Having Slugnoid will make the battle much easier. However, losing the slug can make this fight quite annoying, as the player will need to constantly jump and shoot down. Sometimes a Rocket Launcher or a Heavy Machine Gun box will drop down. However, they may fall in the inside the boss's mouth, making the retrieval process difficult.


AeshiNeroIdle.gif Aeshi Nero: The original variant.
Aeshi Nero MK II: A customized, almost jet-black version of the original version which is also capable of burrowing underground to acquire new targets, smashing them to bits when it emerges with a massive boulder.
Aeshi Nero MK III: Another customized variant, colored purple. Its power output and armor are a significant step up from the previous version, but the more extreme allocation of its power output means that it shoots rocks out without any precise accuracy.


  • If the player moves to the lower right platform below the last item on the tower with the right timing, Aeshi Nero will stop at the base of the tower and not damage the player, making it possible to defeat the boss without climbing the tower (by using the Slug to continuously fire downwards without jumping) or taking on its attacks. This glitch only works in Metal Slug 2, as in the revamped Metal Slug X, jumping on that platform will result in the eventual destruction of the Slugnoid (it is still possible to jump out of the slug or out of the Aeshi Nero's mouth).
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