Double Soul

Double Soul, known in Japan as Soul Unison (ソウルユニゾン), is a term used in the MegaMan Battle Network series of video games and MegaMan NT Warrior (Rockman.EXE) anime and manga. It is an ability employed by MegaMan.EXE (Rockman) to gain added powers and techniques in combat using the powers of an allied NetNavi.

Double Soul was first introduced in the two incarnations of MegaMan Battle Network 4. Out of twelve souls, six were exclusive to either game. It appears once more in MegaMan Battle Network 5: Team Colonel and MegaMan Battle Network 5: Team ProtoMan. It replaced MegaMan's Style Change capability of previous iterations.