Fire Soul

Game
Fire Soul only appears in MegaMan Battle Network 4:Red Sun. MegaMan acquired the ability during the DenDome tournament.

MegaMan.EXE performs Double Soul with FireMan.EXE by sacrificing a Fire-elemental Battle Chip. By charging a fire-elemental Battle Chip, the chip becomes a FireArm that extends across the entire row with a damage of 50 + the Battle Chip's power. Also, when the Double Soul is activated, some panels are changed to Grass panels (in a + pattern on each side) and MegaMan can recover on Lava panels.
 * Charge Shot: Fire blast: a flamethrower-like attack that deals 50 damage and makes the enemy flinch.
 * Weakness: Fire Soul takes 2x damage from Water-elemental Battle Chips.

Anime
Along with the respective navi, FireSoul is referred to as Torch Soul in the anime.