Dark Chip

Dark Chips are powerful BattleChips that increase a NetNavi's strength but destroy its connection with its NetOp and turn the Navi into a Darkloid. ProtoMan.EXE turned evil due to one. Darkloids use these chips to survive. They start out using them to become more powerful, but soon become addicted and need them. After a while of addiction it starts to corrupt their data, until eventually they become so corrupted that they are deleted.