A Dimensional Chip is a Battle Chip utilized by Asteroid Navis to materialize in the real world without the use of a Synchro Chip or Dimensional Area. Upon Slur.EXE giving a operator an Asteroid Navi, he also gives them a Dimensional Chip, though most of the time the operator is unaware of what it does until the Navi commands them to use it, usually claiming it will help them win, only for the Asteroid to materialize before them. Materialized Asteroid Navis stand several feet high and are much larger than any human.
As shown in episode 19, the Dimensional Chip has the ability to bend a Navi to its will if it goes against what its’ original operator wants. This happens when Asteroid NapalmMan.EXE refuses to help Domon Atsuki commit crimes through explosions, and he used NapalmMan’s Dimensional Chip to send him on a rampage. However, the effects seem to be temporary, or NapalmMan was able to get a hold of himself because of Nenji Rokushakudama, as he quickly comes to his senses.