Evil Chip (Battle Chip)

Evil Chips are Battle Chips used in MegaMan Battle Network that can only be used by MegaMan.EXE when his spirit has been significantly put under the control of his Dark Soul.

Evil Chip can refer to any of the 5 Battle Chips from MegaMan Battle Network 4
 * Element Dark
 * Muramasa
 * Anubis
 * Black Wing
 * Bug Charge/Bug Curse (depending on the version of the game).

These chips do not turn a NetNavi evil but like DS version of Navi chips can only be used by Dark Navis.