Gun Beetle

The  is a robot created by the military organization Guardian Units of Nations, and is part the Beetle series. It appears as a enemy in Sonic Adventure 2, Sonic Adventure 2: Battle, Shadow the Hedgehog, and Sonic Generations.

Description
The Gun Beetle resembles greatly the Mono Beetle, but more advanced as it has a gun attached to its underside.

Attack Patterns
The Gun Beetle attacks opponents by shooting bullets at them with its gun. It does not move around much, but instead remains hovering in one place while aiming and shooting at enemies from afar.

Sonic Adventure 2 and Sonic Adventure 2: Battle
The Gun Beetle first appear in Sonic Adventure 2 and its remake Sonic Adventure 2: Battle. When attacking an enemy, it shoots its projectiles once at a time. It awards 100 points when destroyed. They appear in the following stages:

Shadow the Hedgehog
In Shadow the Hedgehog, the Gun Beetle carries a variety of guns which can be picked up when destroyed.

Sonic Generations
In Sonic Generations, the Gun Beetle appears in City Escape, where it fires single projectiles again.

Trivia

 * In Shadow the Hedgehog, in a number of stages, its full name is a "G.U.N. beetle drone sentry".