Spy-I-Cams are an enemy in Banjo-Tooie.
Spy-I-Cams are found in Grunty Industries, frequently in conjunction with Tintops, whom they essentially direct. Banjo and Kazooie must destroy the Spy-I-Cam to stop the Tintops, but this can be difficult as they are hard to find, especially on Floors 4 and 5, and they respawn quickly.
The easiest way to defeat Spy-I-Cams is by eggs. Washer Banjo can also defeat them with his underwear, but this is much harder.