The Phantom Data (Japanese version: Unknown Data (アンノーン・データ, An'nōn dēta?) was used to help in the creation of Bakugan Interspace and the Alternative Weapon System. It was received by Spectra Phantom, Professor Clay, and Marucho Marukura in the second arc of Bakugan Battle Brawlers: New Vestroia; Spectra first mentions it in All Or Nothing.
The Phantom Data is capable of penetrating the firewalls of Bakugan Interspace and infected Interspace in Phantom Data Attack, causing digital clones of Hawktor, Coredem, Akwimos and Aranaut to appear. Mira believed it was sent by her brother, Spectra, as Avatar Baron used a Battle Gear named Battle Crusher, and Spectra was the first user of Battle Gear.
Ren Krawler said he received a slightly different version of it, which contained much more information. Ren possibly made his own copy of the Phantom Data by scanning the DNA Fragments (or just DNA) of Gundalian and Neathian Bakugan.