Metal Slug Wiki

Aeshi Nero

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

While Metal Slug 2/X implies that it is a Martian machine (as the theme "First Contact" plays during the fight instead of the standard boss music), 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. It always attempts to keep distance with the player no matter if they're climbing or not. The tower itself is quite limited as there's no walls on the sides and the random platforms are short.

The Aeshi Nero launches missiles and electric balls. It also intermittently charges a laser cannon that goes up the entire tower. The laser is extremely fast, forcing the player to go to the very edge of the tower. Also, it may lower down to bounce up and electrocute the player with energy sparks on its teeth, so keep on jumping up.

Given the dangers, the player mostly has to constantly jump and shoot down. The Slugnoids near the base makes the battle much easier. 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 Aeshi Nero: The original gigantic serpentine excavator.
MSA Aeshi Nero MK II 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.
MSA Aeshi Nero MK III 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, the 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 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).
  • The Aeshi Nero and the supernatural theme of the mission is likely a reference at the belief that the pyramids were built by aliens.
  • The Aeshi Nero's sprite is incomplete in Metal Slug 2/X with the tower blocking the massive gap on its mouth. The sprite was completed in Metal Slug Attack when it became a playable unit.
Metal Slug 2: Super Vehicle-001/II / Metal Slug X: Super Vehicle-001
Heroes Marco RossiTarma RovingEri KasamotoFio Germi
NPCs POWRumi AikawaHyakutaro IchimonjiDonald MordenAllen O'NeilAbul AbbasRebel ArmyMartians • Arabian Townspeople • Parker • Baby • Miner • Dead Explorer • Scott Amundsen Jr.Genie of Lamp • Delivery Boy* • ScientistsOrcaMargaret Southwood
Enemies Rebel InfantryFanaticsGrenade SoldierBazooka SoldierShielded SoldierBikersRebel RiflemanMortarRocket Diver† • Arabian InfantryBatMummies (Mummy Generator) • Dog Mummy† • Chariot† • Mutated SoldiersMars PeopleMini-UFO
Enemy Vehicles Di-CokkaM-15A BradleyT-2B Melty HoneyMV-280BNop-03 SarubiaGirida-OIron IsoBull Chan† • 3-ton Utility TruckLandseekR-ShobuRebel RocketMH-6S MasknellFlying TaraEaca-BJet Hammer-YangMG-36Ferry Boat* • Double-Decker BusSubwaySpace Tank
Bosses The Keesi* / Iron Nokana MK II† • Aeshi NeroDragon NosukeBig ShieeHozmiRugname
Mini-Bosses: Mosque ArtilleryThe KeesiShoe & KarnAllen O'NeilDai-Manji
Weapons Heavy Machine GunRocket LauncherShotgunFlame ShotEnemy Chaser† • Iron Lizard† • Super Grenade† • Drop Shot† • GrenadeFire BombStone
Slugs SV-001 (SV-001 Type-R†) • SlugnoidSlug FlyerSV-Camel
Missions Drifting in DesertMonument of DepressionMadrigal of WindReturn to Hong-KongKiss in the DarkI Wish to Believe in Love
Other Combat School (Dialogue) • Super Devil ModeAnother Mission† • TransformationsEnvironmental ObjectsCivilian Vehicles • "Angry Man"†
* Exclusive to Metal Slug 2. † Exclusive to Metal Slug X.
Metal Slug TetsuyukiHairbuster RibertsTani OhShoe & KarnIron NokanaHi-Do
Mini-Bosses: Mini-BataAllen O'Neil
Metal Slug 2/X The Keesi II / Iron Nokana MK II (X) • Aeshi NeroDragon NosukeBig ShieeHozmiRugname
Mini-Bosses: Mosque ArtilleryThe Keesi II (X) • Karn (X) • Allen O'NeilDai-Manji
Metal Slug 3 Huge HermitMonoeye UFOJupiter KingSol Dae RokkerRootmars
Mini-Bosses: Twin Ohumein-CongaMonoeyesHairbuster RibertsHi-DoRugnameFake RootmarsClone Incubator
Metal Slug 4 Brave GuerrierToschka DalanueThe IronBig JohnSea SatanAmadeus Mother Computer
Mini-Bosses: Mecha Allen
Metal Slug 5 Metal RearShooting RayScreamerSand MarineAvatar of Evil
Mini-Bosses: Black HoundStone Turtle (unused) • Gaia ElephantPtolemaios (unused)
Metal Slug 6 Bull DrillIron SentinelBrain RobotElder CentipedeInvader King
Mini-Bosses: Invader ControllerKing's Cocoon
Metal Slug 7/XX Iron Death WormCrablopsDestroyed CrablopsFall ClimberThe UnionRebel GigantKraken
Mini-Bosses: Scrap TowerBig Gate
Metal Slug: 1st Mission Rebel VTOLRebel TrainMacbaRebel ZeppelinElectromagnetic CraneWeapons Port BossMetal Strider
Mini-Bosses: Facility ElevatorMacbaRebel Truck
Metal Slug: 2nd Mission Big BerthaTerrain CarrierRebel ReactorMacbaRebel SubmarineRebel BlimpTani OhWiredRebel AirplaneMetal StriderRocket UFO
Mini-Bosses: Power GeneratorsRebel RocketHyakutaro
Metal Slug Advance FormorEmain MachaKaladgolgThe Keesi IIICabracan
Mini-Bosses: Allen Jr.
Metal Slug 3D Spider-BotUnderground Cruise MissileMorden's BattleshipMorden's CastleLugusLieu
Mini-Bosses: ParachuetruckMosque ArtilleryAllen O'Neil"Rebel Destroyer Ship"
Metal Slug Attack Pharaoh's ArcPtolemaiosBall SlugGreat MotherMars GigantalosK-O3 Coupled Armored VehicleLand BlowfishCyclobsterSlug SquareZoni DolomaQuadro JumperDenturionD-GuFortmeranianRock MoleGiant CopterEt A OmnisVortexDigger BaseCrusty LegsArmored CrawlerQueen Big Snail7000 Class LocomotiveRiviere HyllMetal Fusioner No.223Drum SlugMars WolfSea DragonTetsujin SquadSand Twister No. 1GigantnoidDark GateKnight TankImpact CannonDive Assault Cannon AndrewOld Blood BeastOmikami
Metal Slug: Awakening SphinxConga Lava DominatorApepMoltar's LegacySteel CongaSherpaKhepriGordosTarpuReshephGold EyePharaohEarthcore DeityCrystal Beast CentipedeCrystal Beast CongaLauraCruiser Titan SubmarineAntaMecha AllenSirenTitanEchoAzagGalooSylrushRefining CauldronReaperCaesarenes
Mini-Bosses: The Keesi IIAllen O'NeilIron NokanaMetal RearHellfire Bat KingShabtiBlack Hound
Joint Operation: VolmesFireflyGenaroKatherineRebel Warbot Raidenjin (unused) • SilenceMechanistSix-Armed Machine
Joint Operation Abyss S1: BeruaMeiruizigeMech Hermit CrabMachine GuardMaat
Joint Operation Abyss S2: Anta (Cursed)Fist Fungus Beast (Cursed)Cruiser Titan Submarine (Cursed)Knight Conga (Cursed)Siren (Cursed)Titan (Cursed)Firefly (Cursed)Cetus (Cursed)
Others: Dr. NeanderRift Crystal BeastCalamity Crystal BeastCalamity SnakeEye of CalamityTreasure Bowl
Flashback Mode: Hairbuster RibertsTetsuyukiMini-BataMosque ArtilleryGreen Ohumein-CongaRed Ohumein-CongaHuge HermitBig ShieeTani OhBig JohnHi-DoBombardier CaptainDragon Nosuke
Mobile Games Rocket Control RoomUnknown AlienHellfireSpiderbotCyclopsMega Laser TurretMars Battle UFOM-32 Water Carrier PlaneKouraiAlien Floating Structure
Irem's D.A.S. Universe Chi Un-D