The epic saga concludes in Mega Man Zero 4 for the Game Boy Advance. Zero returns to protect a group of humans fleeing Neo Arcadia in the 'Area Zero' settlement. This time, he must stop the villainous Dr. Weil and his Einherjar Eight Warriors from launching the Ragnarok satellite. Introducing the 'Zero Knuckle' system, Zero can now steal and use weapons directly from his enemies. The game also features a dynamic Weather System that alters stage difficulty and rewards. With high-speed combat, a deep parts-crafting system, and an emotional story, Zero 4 provides a fitting finale to one of the most challenging and beloved action series on the GBA.