Claymore

Claymores are the Radiant Garden's defensive system, installed presumably by Cid, who also presumably gave them their name.

First Visit
Claymores assisted Sora, Donald Duck, and Goofy in defeating any Heartless or Nobodies within the village's borders.

Visit before Space Paranoids
At one point, however, the MCP of the Hollow Bastion OS took control of the Claymores, making them attack Sora instead.

Apperance
Claymores are spheres of light that appear from the ground. After forming a circle beneath the target, the sphere is launched up to inflict damage. The damage, unfortunately, is very minor as it can only send the target flying into the air at best. Furthermore, they are easy to dodge.

Confusion
These are not to be confused with the weapon of choice of Saïx.

Trivia

 * In Re:Chain of Memories, in the 13th floor and 1st basement, a system similar to the Claymores is present to attack Sora and Riku.