Dr. Wily's latest scheme has seen him hijack a supercomputer that governs daily life across the world, causing abnormal weather, transportation failures, and other such chaos. If that weren't enough, he also sends out an army of robots to cause chaos and mayhem, and as per usual Mega Man sets out to stop him. In his way are eight rebuilt Robot Masters, along with Wily's second attempt at creating a Mega Man Killer, Punk.
Mega Man III combines the expanded campaign from Mega Man II with the polish, execution and difficulty of Dr. Wily's Revenge, and as such is generally regarded as a better game than both of its two predecessors, albeit not quite up to the standards of the two following entries. The gameplay is pretty much identical to the NES Mega Man 4, meaning that the Charge Shot is added to Mega Man's repertoire for this outing.
Robot Masters from Mega Man 3:
- DWN-019: Gemini Man, gives the Gemini Laser
- DWN-022: Snake Man, gives the Search Snake
- DWN-023: Spark Man, gives the Spark Shock
- DWN-024: Shadow Man, gives the Shadow Blade
Robot Masters from Mega Man 4:
- DWN-027: Drill Man, gives the Drill Bomb
- DWN-030: Dust Man, gives the Dust Crusher
- DWN-031: Dive Man, gives the Dive Missile
- DWN-032: Skull Man, gives the Skull Barrier
The remaining Robot Masters from 4 NES were held over until the following Game Boy outing.
New for this game:
- MKN-002: Punk, gives the Screw Crusher
- All There in the Manual: None of the storyline is explained in the game, which seamlessly hides the fact that the Western storyline is completely different (with Wily instead trying to harness the energy of Earth's core via his Wily Station, wih no mention of the supercomputer subplot).
- Astral Finale: Averted. This is the only game in the Game Boy series in which Mega Man doesn't go to space at any point.
- Clipped-Wing Angel: The final form of the Wily Machine has only one easily-dodged attack that deals a pittance of damage, especially compared to the first form. It also remains stationary, again contrasting its first form. On the flip side, only one weapon can harm it and the challenge comes from trying to hit him with it, but even then a player's not likely to run out of ammo.
- Contractual Boss Immunity: Like Enker before him, Punk is only vulnerable to the Mega Buster; all other weapons are useless on him. This also applies to the Wily Machine, which is only damaged by the Mega Buster in its first form, and the Screw Crusher in its second.
- Crutch Character: The Shadow Blade is downgraded to this, compared to the NES game. It kills most enemies in the first 4 stages in 1-2 hits, but is far less effective on the enemies from Mega Man 4.
- Deadly Disc: Punk's Screw Crusher, which is thrown in an arc and has a high ammunition level. Considering it's the only weapon that can beat the Final Boss's second form, you'll need it.
- Dem Bones: Skull Man, his stage and the Skeleton Joe enemies.
- Difficulty Spike: The levels for the Mega Man 4 Robot Masters are somewhat harder than those of their Mega Man 3 counterparts (especially Dive Man and Dust Man's), but at least your weapons are recharged between the levels unlike in the preceding or succeeding game.
- Dramatic Thunder: Present when Mega Man arrives outside the newest Wily Castle following the defeat of the first four Robot Masters.
- Giant Mook: Although the regular kind are absent, Giant Suzy acts as a giant version of the Adhering Suzy (or Octopus Battery) enemy from the first game (and Dr. Wily's Revenge).
- Hard Levels, Easy Bosses: Despite the game's notoriously difficult level designs, its Robot Master battles are actually pretty easy for the most part, thanks to the introduction of the Mega Buster's charge ability.
- Long Song, Short Scene: Punk's leitmotif ends abruptly when Mega Man enters the room they fight in, before it can loop.
- Marathon Level: The Wily Station stage is far and away the longest stage in the game, with no breaks to be found at all. Even worse is that another Giant Suzy (previously fought as a boss between each set of Robot Masters) has to be fought near the end.
- Nintendo Hard: Oh yes. Though the Mega Man series is this in general, III is often considered to be the hardest game in the Game Boy series, if not the franchise itself. It's usually considered a toss-up between this game, which has extremely tough level design bordering on outright Platform Hell in the second half, and Dr. Wily's Revenge, which is shorter and has slightly easier levels, but no Charge Shot, no energy tanks, very few item drops, and no Rush equivalent until you get to the first Wily stage.
- Orbiting Particle Shield: The Skull Barrier makes its return, but is significantly stronger than it was in Mega Man 4 as it now takes three hits (not just one) before dissapearing.
- Rearrange the Song: After the mixed (to say the least) reception of the previous game's almost entirely original soundtrack, this game went back to the Dr. Wily's Revenge approach and mostly used remixed music from the NES entries, with a few new original themes along the way.
- Recurring Boss: Giant Suzy antagonizes Mega Man twice; first at the start of the Wily Castle (before encountering the second set of Robot Masters), and again near the end of the Wily Station.
- Sequel Difficulty Spike: Granted, anything would have been harder than the previous game, but it's still very difficult all the same, even by Mega Man standards.
- Sequel Escalation: Actually a little less than in the previous game, but there is a proper boss select screen for the Mega Man 4 Robot Masters, instead of the teleporting hatches in the previous game. This, incidentally, makes Mega Man III the only one of the Game Boy entries not to have a teleporter room.
- Strictly Formula: By now the Game Boy sub-series was settling into a pretty recognisable format (despite the lack of an Astral Finale that was present in the other games), though the following game would shake it up a little (and Mega Man V would shake it up a lot).
- Supervillain Lair: The Wily Castle makes its return, though in a unique twist, the second set of Robot Master stages are all set inside the castle itself.
- Unique Enemy: In Wily Station, a Neo Metall from Mega Man 2 and an original Metall from Mega Man appear. Those two are the only ones of their respective kind in the game.