Evil Chip (Battle Chip)

Evil Chips are Battle Chips in MegaMan Battle Network 4 that can only be used by MegaMan.EXE when his spirit has been significantly put under control of his Dark Soul. To open the entrance to Black Earth, the player must have the following 5 Evil Chips: Muramasa, Anubis, ElemDark, BlakWing, and BugCharg/BugCurse.

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

DS Navi Chips
When a DS Navi is defeated (or when achieving the specific busting level against an SP Navi), MegaMan will receive that Navi's DS Chip. DS chips, like Evil Chips, can only be used by dark NetNavis. The power of these DS Navi chips also depends on the total number of open Dark Holes on the field on either player's side. Depending on the Navi Chip, this is a bonus of either +5 or +10 ATK for each Dark Hole on the field, with the bonus capping at 10 Dark Holes.

In MegaMan Battle Network 5, MegaMan cannot use these chips if he is not in Dark Mode (gained by using Dark Chips before), but other Navis (only in Liberation Missions) can use them.

Trivia

 * The Blackwing chip's attack animation is a direct copy of the attack animation of the DarkMan chips in MegaMan Battle Network 3.