Photon Debugger

The Photon Debugger is a Keyblade acquired after Sora's first trip to Space Paranoids in Kingdom Hearts II. This keyblade also appears as a card in Kingdom Hearts Re:Chain of Memories in a reward room.

Acquisition
The keyblade is given to Sora by Tron after the two of them defeat the Hostile Program before it could destroy Hollow Bastion.

In Kingdom Hearts: Re:Chain of Memories, the Photon Debugger can be acquired in the 12th floor (Destiny Islands) using a Key to Rewards card - that too, after completing Reverse/Rebirth mode (or Kingdom Hearts II: Final Mix+ in the Japanese version of Re:Chain of Memories).

Appearance
The Photon Debugger looks similar to the inhabitants of Space Paranoids, appearing to be constructed of computer circuitry. The key chain is a miniature version of the Data Disk used by Tron in both Kingdom Hearts II and the film, Tron.

Etymology
Its name comes from two words; debugging is a way to get rid of a computer virus: it is possible that the virus are the Heartless and are destroyed by the Keyblade. Photons are forms of light, and Sora is the wielder of the Keyblade of Light.