Mega Man Zero 2 [a] is a video game developed by Inti Creates and published by Capcom for the Game Boy Advance (GBA) handheld game console. It is the second video game in the Mega Man Zero subseries of Mega Man video games.

The game is set one year following the events of Mega Man Zero , and follows the same basic format as its predecessor, being a side-scrolling, platform action game. Once again, players take control of the Reploid known as Zero, and lead him through various levels in the battle against the forces of Neo Arcadia.

One year has passed since Zero defeated Copy X. He has since separated from Ciel and the Resistance, now wandering the desert and defeating countless Pantheons. The three surviving members of the Four Guardians have assumed command of Neo Arcadia, with Harpuia as the leader. Copy X's death was covered up, as the humans revered him as their savior. The Resistance is now being led by a Reploid named Elpizo, while Ciel continues her work on a new form of energy that will hopefully eliminate the need for war.

Zero wearily makes his way through a sandstorm wrapped in a tattered cloak. As the sands die down he is once more being chased by enemies. Despite being in disrepair, with cracked armor and broken weapons, he charges into the fray. After the battle, Zero collapses from exhaustion and is found by Harpuia. Wishing to see Zero die in battle rather than perish from exhaustion, Harpuia rescues Zero and covertly delivers him to a location near the Resistance base, where he is found and repaired. He learns that Elpizo is planning a frontal assault on Neo Arcadia, as he doesn't believe in Ciel's plan of creating energy as means to resolve the war. Unable to convince him to call it off, Zero is left to do busy-work in the meantime.

Elpizo's assault fails miserably, himself being the only survivor. Driven mad, he declares his desire to harness the power of the legendary Dark Elf to destroy Neo Arcadia (and wipe out the humans), which had brought about the Elf Wars a century ago that left the Earth in a disastrous state(first the planet, then the population, since the first were the reploids of the dead 90%, and the second were the people of the dead 60%). Using the powers granted by partially unsealing the Dark Elf, he invades Neo Arcadia and breaks into the temple where the body of the real X is kept. It is revealed that X ended the Elf Wars by sealing the Dark Elf away with his body, thus leading to his disappearance. Despite the Guardians' and Zero's best efforts, Elpizo destroys X's body, which unseals the Dark Elf, and Elpizo absorbs its powers.

After a fierce battle, Zero puts an end to Elpizo's plans, who reverts to his normal self and apologizes as he dies. Surprisingly, the Dark Elf turns him into a Cyber-elf, convincing Elpizo that she is not truly evil. As the Dark Elf departs, X appears and tells Zero about the Dark Elf: she was originally known as the Mother Elf and was the savior who ended the Maverick Wars, but was later cursed by a man named Dr. Weil. Zero admits to feeling like he knows her.

In a post credits scene, an unknown man notes the Dark Elf has been released, and tells an entity known as "Omega" that it is time to take action.