Mega Man: Dr. Wily's Revenge

Mega Man: Dr. Wily's Revenge, known as Rockman World (ロックマンワールド) in Japan, is the first Mega Man game for the Game Boy.

Overview
The game recycles content from the original Mega Man for NES and its sequel, Mega Man 2. At the start of the game, only four robot master levels are available to choose, all of which are from Mega Man. The second four robot masters, all of which are from Mega Man 2, are fought as bosses in the Wily Stages of the game. This would become a staple of the Game Boy games until Mega Man V, the only Mega Man for Game Boy not to recycle large amounts of content from the NES games.

Story
Dr. Wily once again sets his sights on world domination. This time, he revives several of his Robot Masters, giving them another chance to do battle with Mega Man. Four Robot Masters rampage across the globe, so Dr. Light sends Mega Man out to stop them. Once they are taken down, Mega Man heads to Wily's fortress only to discover that four more Robot Masters await him there. To make matters worse, Dr. Wily has constructed a new, powerful robot known as a Mega Man Killer specially to destroy Mega Man. Named Enker, he has the ability to absorb Mega Man's plasma shots with his lance and return a powerful blast of energy at him with his Mirror Buster attack; however, Enker is defeated, and Mega Man chases Wily to his space fortress above the Earth, using Enker's own Mirror Buster to defeat him.

Bosses
First four Robot Masters:
 * DRN-003 Cut Man
 * DRN-005 Ice Man
 * DRN-007 Fire Man
 * DRN-008 Elec Man

Second four (in teleporter system):
 * DWN-011 Bubble Man
 * DWN-012 Quick Man
 * DWN-014 Flash Man
 * DWN-015 Heat Man

Mega Man Killer:
 * RKN-001 Enker

Final boss:
 * Wily Machine World No. 1