A Blox Bug's main body is nearly identical to that of a regular Bug Blox; it is a black cube with red circuitry. It has a single, glowing yellow eye near the center of the front of its body. Four long, red, spider-like legs sprout from its sides.
The Blox Bug's name is a play on its insectoid legs and its resemblance to Bug Blox.
Blox Bugs are fairly easy enemies to defeat using physical attacks and magic. Their attacks consists of a jumping attack that hits you from above, and a charge attack, in which they run straight at you. They can be thrown off balance by blocking their charges, leaving them vulnerable to attack.