Atomic Fire

Atomic Fire is Heat Man's power.

Robot Masters And Bosses Weak Against Atomic Fire

 * Wood Man: Mega Man 2 and Mega Man: The Power Battle
 * Air Man: Mega Man 2
 * Quick Man: Mega Man 2 and Mega Man: Dr. Wily's Revenge
 * Flash Man: Mega Man 2 and Mega Man: Dr. Wily's Revenge
 * Wily Machine 1: Mega Man 2 and Mega Man: Dr. Wily's Revenge
 * Wily Machine 2: Mega Man: The Wily Wars
 * Plant Man: Mega Man 2: The Power Fighters

Robot Masters And Bosses Immune To Atomic Fire

 * Magmard Serpent: Mega Man: The Wily Wars
 * Alien: Mega Man 2

Trivia

 * This is the first chargeable weapon before the Mega Buster.