The Neo Metall (ネオメットール Neo Mettōru) is an upgrade of the Met. It now has feet and can walk.
The Metall DX (メットールＤＸ Mettōru DX, Metall Deluxe) is an upgraded version of the Met that appears in Mega Man 3. Most of the Metall DX act similar to the Neo Metalls from Mega Man 2, but there are some that have retractable propellers in their head that allow them to fly. They fly up to enemies and shot three bullets down on them. The Heli Metall from Mega Man 7 is similar to this Met.
The Giant Metall (ジャイアントメットール Jaianto Mettōru) is a sub-boss from Mega Man 3 that can shoot giant bullets and throws out three regular Mets. It can only be hurt on the red "+" mark on its helmet. Search Snake and Hard Knuckle are the weapons that causes most damage to it, but they are not easy to use against it. Two Giant Mets appear in the Doc Robot Needle Man stage, but if one looks closely in Needle Man's proper stage (before the Doc Robot reprise), one can see the helmets under the platforms.
Metall EX (メットールＥＸ, Metall EX?) is the name used for all three types of Mets in Mega Man 4 (walk, jump, and spin), but the spinning Met is also known as "Metall Dance" (メットールダンス) in RockBoard. The first two Met versions act similar to typical Mets, walking or jumping after shooting, but the Metall Dance does a sort of ballet spin that shoots three shots in a row, straight out. It takes three normal shots or one charged shot from the Mega Buster to take a Metall Dance down.
The Metall Swim (メットールスイム) is a Met equipped with flippers and a snorkel that first appears in Mega Man 4. It appears in the underwater areas at Dive Man's stage in Mega Man 4 and Mega Man III, in the second part of the Wily castle in Mega Man 5, and a Met race in Wily and Right's RockBoard: That's Paradise. Swim Mets bob up and down to swim toward Mega Man while shooting. They still take only one shot to go down. There are deluxe versions of them in Mega Man 7 called Swim Metall DX.
often called "Met", is an industrial robot that appears in Guts Man's stage. It sits on the floor hidden in its indestructible helmet, and when someone gets close it lifts its helmet and shoots three diverging bullets.
They reappear in Mega Man: Powered Up. On Easy mode, Mets only shoot a singular bullet forward. Strangely, the bullet that is shot diagonally down is never seen in the game, as it always hits the piece of land the Met is sitting on. Comically, Mets can be flipped over onto their helmets by hitting them with a Proto Strike or by detonating a Hyper Bomb next to them. The Met will then continue to rock about on its helmet, where you can easily shoot it or leave it to its own devices.
This variant reappears in Mega Man 9 as Metall β.
The Space Metall (スペースメットール) is a type of Met equipped with jet packs to chase enemies. Because of this, Space Mets are unable to shoot and hide into their helmets. They appear in Star Man's stage.
Metall Mommys (メットールマミー) explode and give off three Baby Mets when shot. Found mainly in Stone Man's stage, but they also appear in the second Wily stage. There are similar enemies in Mega Man ZX called Remettaurs.
Baby Metall (ベビーメットール) is the name of the small Mets with pacifiers released by a Metall Mommy.
Metall K1000 (メットールＫ－１０００) are Mets that ride locomotives. They, like all Mets, can only be hit when their eyes are open, but they also shoot and "toot" and charge toward Mega Man. The safest place is just above or just below them. Very appropriately, they are located in Charge Man's train level.
The name may be a pun: sen is Japanese for "line/rail" as well as the number 1000. Keisen is Japanese for "track." Kilo is also Latin for 1000 and frequently abbreviated to K, so from keisen we can derive K1000.
The Metall Cannon (メットール砲台 Mettōru Houdai) is a cannon with a Met operating it. The cannon fires large projectiles, and the operating Met can only be hurt when it pops its face out.
Hell Metall DX (ヘルメットールＤＸ) is a shielded Met from Mega Man V. When shot, the lower treads part of it explodes and the met falls to the ground, still hiding behind its shield
The Metall Pottone Metall Potton (メットールポットン) dispenses two types of Mets. It has a whole array of them stashed under a dome and drops them out one by one. Metall Pottons appear in Tomahawk Man's stage and in the final section of Dr. Wily's castle. This Met makes a cameo in a stage in Marvel vs. Capcom.
Mettonger Z (メットンガーＺ, Mettongā Z?) is the boss of the third Mr. X stage, and located in the boiler area's main boiler room. Its attack alternates between straight shots and bouncing bullets. In either case, the weak spot is the Met in the cockpit, and the best weapon is Blizzard Attack. It is based on the robot Mazinger Z.
Metall FX (メットールＦＸ) is the name of the Mets from Mega Man 7 and Mega Man 2: The Power Fighters. In Mega Man 7, these Mets appear in the opening stage, Junk Man's stage, and the third part of the Wily castle stage.
In the first three Mega Man Zero games, the player can use Cyber-elves to turn some aerial enemies into "Heli Metall RW". Those Mets act similar to the original counterpart, except that when hit in the propeller they will fall and act as normal Mets.
Sabotall (サボットール, Sabotall?), also known as Sabottol, is a Met with a cactus instead of a helmet that appears in Mega Man Powered Up. It shoots five thorns in different directions, although on Easy mode it does not shoot at all. Its name is a combination of the words saboten (cactus in Japanese) and Metall. This spiky robot can be found in Oil Man's level.
The Fire Metall (ファイヤーメットール) are Mets dressed up as Fire Man. In Mega Man 8, they first appear in Grenade Man's stage, and they tend to be the ones who set ablaze the big boxes of dynamite in the second half of said stage. They also appear in the first stage of Dr. Wily's castle, after the conclusion of the sledding portion. In Mega Man & Bass, they create flame spires and have treads rather than feet. In Mega Man & Bass they appear in the museum stage, Dynamo Man's stage and in the final stages.
The Metall β (メットールβ) appears in quite a few stages in Mega Man 9. Its "cousin" is the Camouflametall. It looks and acts exactly like the Met from the first Mega Man game. Black Hole Bomb and Tornado Blow are one of the few weapons in the original series of Mega Man able to kill Mets even when they're hidden under their helmet.
Camouflametall (カモフラメットール, Camouflametall?), its name being a combination of camouflage and Metall, and often called the Fake 1-UP, is encountered in Wily stage 3 and Special Stage in Mega Man 9 and is a very common enemy in Superhero mode. It behaves like an ordinary Metall, but is disguised as a 1-up, and bullets shoot through it to trick players even further. Its colour even depends on the current weapon of Mega Man and Proto Man.
Metall C-15 (メットール Ｃ－１５) is the basic Met of the first Mega Man X game, and appears in the stages of Armored Armadillo, Storm Eagle, Flame Mammoth and the first Sigma stage. It acts like its classic predecessor, hiding under its helmet most of the time, trying to attack the player from the back. The Garakuta Robot from Mega Man X2 uses parts of it.
Metall D2 is a spy Met equipped with a walkie-talkie antennae and night vision that first appeared in Mega Man X4 as part of Repliforce's bid for independence, and later in Mega Man X6. Similar Mets also appeared in other Mega Man X games shortly thereafter, including the Metall T and the Mets in Mega Man X: Command Mission.
Metall T is a small modification of the Metall D2. They still function the same as their predecessors.
Numetall (ヌメットール, Numetall?) is a slug-like Met from Mega Man 10. They release three destructible balls of sludge that stick on the player, causing them to slip and slide as if they were on ice. The balls can be destroyed when playing as Mega Man by using the Solar Blaze on himself. They appear in Pump Man's stage, Wily Castle 1, Wily Castle 3 and Special Stage 1. In Hard Mode, they also appear in Wily Castle 5 and the effect of the sludge-balls lasts longer. Its name is a combination of Metall and the Japanese word "numenume", which means slippery. They are also better at hiding under their helmet than normal Metalls.
The standard Met in Mega Man X8, which acts similar to the Met C-15 from the first Mega Man X game. Most of the time they hide under their helmets, lifting only to attack with one bullet or to attack the player from behind, but can be turned around by breaking their defense. When powered up by a Bulbrite, it shoots three bullets instead of one. It appears in Noah's Park and Metal Valley.