Hostile Program

The Hostile Program is a boss from Kingdom Hearts II.

Upon realizing the threat of Tron and Sora, the MCP had Commander Sark deploy a special program virus called the Hostile Program. It caused chaos for the computer world as well as the real world in Hollow Bastion. It somewhat combined the attributes of the Strafer, the Magnum Loader, and the Devastator, though it itself is not a Heartless. The Hostile Program was the first boss of Space Paranoids. When the Hostile Program is hit a certain number of times, the outer shell will fall off. It battles largely using lasers. It has three eyes, each similar to the ones Heartless have.

During battle, the Hostile Program moves only in a circle around the room and fires many lasers at the party. After defeating the Hostile Program, Tron gives Sora the Photon Debugger keyblade.

Kingdom Hearts II
An executable called from the DTD dataspace to destroy the town.

Trivia

 * The Hostile Program, along with the Experiment in Halloween Town, Hayner, and Riku, are the only four boss characters in the game who are not Disney or Final Fantasy or connected to the Heartless or Nobodies in some way. These characters are located in the journal entries as antagonists, with red squares.
 * Hostile Program could not be defeated on early copies of Playstation 3. Instead of firing lasers, it became invincible. This bug can now be fixed by downloading an update from Play Station Network.