Proto Soul

MegaMan.EXE performs Double Soul with ProtoMan.EXE by sacrificing a Sword-elemental chip in both MMBN4 and 5. MegaMan now gains the power to perform StepSword by charging a sword chip, although its range will change depending on the sword chip. Also, MegaMan gains the Reflect program, but it overrides all other programs that uses the back+B button. Also appears in MegaMan Battle Network 5.
 * Charge Shot: WideSword (a regular WideSword that deals out 80 damage and in MMBN5, gains a 10 damage power boost for any additional levels to the Buster Power)
 * Weakness: The Proto Soul does not allow Program Advances to be charged, but most of the P.A.'s doesn't need it anyways. Also, the StepSword can leave MegaMan open to a Slasher, and any direct contact while using StepSword on an enemy will leave MegaMan injured. Also, Like Guts Soul, Proto Soul is very limited in range when it comes to the charge attack.