Illegal Cards

Illegal Cards are vastly powerful Battle Cards that are only obtainable through Illegal Data. Most of Illegal Cards ends with a "X", which are successors to the concept of Dark Chips, while others are just unobtainable through normal gameplay. They all do not appear in the Mega Man Star Force 3 library, but their ID sorting is equal to the next tier of the series they come from (e.g.: Impact Cannon is placed directly after Heavy Cannon).

Illegal Data can only be acquired if the player finishes the battle with over 100% Noise, and if the player S-ranks a battle with at least 200% Noise, they may obtain multiple pieces of data at once. Some bosses such as RogueZZ may yield Illegal Data containing Giga Cards or Galaxy Advances, on rare occasion. At other times, Illegal Data may instead take the form of a Noise Fragment rather than any Battle Card.