The first Mega Man you could close your hand around — and the first to invent a robot built only to kill you.
In 1991 Capcom let the Game Boy carry Mega Man for the first time, handing the work to Minakuchi Engineering — and rather than a brand-new world, they rebuilt the bosses of the NES games on a tiny green screen: the first four Robot Masters from Mega Man, the next four from Mega Man 2. But waiting at the end was someone who had never existed before: Enker, named after the Japanese music genre enka, the first of the 'Mega Man Killers' — a robot designed for no purpose but to destroy you. The strange magic is that a portable, made of borrowed pieces, is remembered for the one new thing it dared to add.
About this game
Mega Man: Dr. Wily's Revenge is a 1991 action game for the game boy, developed by Capcom. It belongs to the Mega Man series.
Tricks & Tales
Enker, the game's original final boss, was the first of Capcom's 'Mega Man Killer' robots — and his name comes from enka, a genre of Japanese music, keeping the series' tradition of musical names. Enker's weapon, the Mirror Buster, is the only weapon that can damage the final form of the Wily Machine — making the new boss's reward essential to actually finishing the game. It was Capcom's first portable Mega Man and the first time the company outsourced a Mega Man game's development — to Minakuchi Engineering rather than its internal team.
Collector's Guide
Region & Compatibility
The original Game Boy is fully region-free. A cartridge manufactured for Japan, North America, or Europe will run on any DMG unit from any region with no adapters, no modifications, and no lockout chip to defeat. The game's language is determined entirely by the software on the cartridge — the console hardware applies no restriction. The only notable caveat is that cross-region link-cable multiplayer may not function correctly in all titles. If you are buying Japanese-market Game Boy software to play on a non-Japanese DMG, or vice versa, hardware compatibility is simply not a concern.
Maintenance Tips
Vertical lines on the LCD are the Game Boy's signature aging defect. The cause is delamination of the ribbon cable that connects the LCD panel to the board. The standard repair is to apply heat along the ribbon cable near the LCD edge -- a soldering iron (at low temperature) run slowly along the ribbon cable reflows the connection and usually clears the lines. This repair has a documented success rate and requires no replacement parts. The speaker can be replaced with any 8-ohm 0.5W speaker of similar dimensions; audio quality often improves noticeably with a new unit. Clean battery terminals with vinegar and a cotton swab if corrosion is present. The contrast dial uses a potentiometer that can be cleaned with contact cleaner if the image is unstable at certain positions. Use fresh alkaline AA batteries -- rechargeable NiMH cells run at lower voltage and may cause erratic behavior.
Going deeper
Explore the machine this game ran on, and what to check before you buy or care for one:
What to Watch Out For
Before buying, these are the points worth knowing — from someone who handles original Japanese Mega Man: Dr. Wily's Revenge copies regularly.
Is the Japanese 'Rockman World' the same game as the Western 'Dr. Wily's Revenge'?
Yes. 'Rockman World' is the original Japanese title; 'Mega Man: Dr. Wily's Revenge' is the Western release of the same 1991 Game Boy game. Cartridges are region-specific, so a Japanese cart shows the Rockman World label and Japanese text.
Was it ever re-released, or is the original Game Boy cart the only way to play it?
The original 1991 Game Boy cartridge is the primary release. It has also appeared in later Capcom Mega Man compilations, so check whether you want the authentic cart or a modern collection before buying.
Before You Buy
Things worth knowing before you buy Mega Man: Dr. Wily's Revenge
A short checklist for buying a used Game Boy cartridge wisely — useful with any seller, anywhere.
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Choose a seller who tests it before shipping
A copy that has actually been powered on and checked is a known quantity. An untested one is a gamble you only settle after it arrives.
Look for a seller who states it was function-tested and says what they confirmed. A serious seller can tell you exactly what was checked.
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Good news — Game Boy is region-free
Game Boy and Game Boy Color cartridges are not region-locked, so a Japanese copy plays on any Game Boy worldwide.
Just confirm the hardware family — original GB, Color, or Advance — matches the cartridge.
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If this title saves your progress, check the battery
Cartridges that save use a small coin-cell battery that fades over decades — a dead one wipes your save without warning.
Ask the seller whether the save function was tested. Replacing the battery is possible, but doing so erases any existing save.
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Check that the contacts are clean
Dirty edge contacts are the most common cause of startup and sound trouble in cartridges of this age.
Choose a seller who cleans the contacts before shipping. A note that it was tested and cleaned means the basics were handled.
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Read the seller's reviews and return policy
A 100% positive record across thousands of sales is close to a guarantee — packing, communication and problem-solving all work for everyone. A return policy protects you if something is off.
Read the feedback and confirm a clear return window before you buy.
The last step before buying anywhere is knowing what it's worth.
See what it's selling for on eBay →Unexpected Discoveries
Games you weren't looking for — but might be glad you found.
Rooms this game lives in
Wander deeper — explore the themed rooms where Mega Man: Dr. Wily's Revenge sits alongside its kin.
Memories from around the world
This is a young museum, and this page is still waiting for its first voices. The memories people send reach Taisei personally, and the ones that move him find a home here over time — always with the writer's blessing. Yours could be the very first for this game.
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