VolGear

VolGear are viruses appearing in Mega Man Battle Network and Mega Man Battle Network 4 games. When in battle, VolGear viruses move on the two panels not aligned with MegaMan. When attacking, the viruses open their clenched jaws and release a homing fire tower. In Mega Man Battle Network 4, the EX versions open their jaws and three random panels will flash, engulfing them in fire towers. During their attack process, these viruses do not teleport if the player moves to the same row, resulting in the window of opportunity for attack. In Mega Man Battle Network, there was an Aqua variant of this virus, which attacked with water towers instead.

VolGear Family
VolGear

VolGear have a grey colored body and hat, red flames for limbs, and a red colored face.

 VolGear2 

VolGear2  have a light-grey colored body and hat, blue flames for limbs, and a blue colored face. They only appeared in Mega Man Battle Network game, and unlike all the other member of VolGear family who are Fire attributes, VolGear2 are actually Aqua attributes, whose attack is a water tower instead of a fire one.

 VolGearEX 

VolGearEX   have a purple colored body and hat, red flames for limbs, and a red colored face.

 VulGear 

VulGear   have a blue colored body and hat, pink flames for limbs, and a pink colored face.

 VulGearEX 

VulGearEX   have a yellow colored body and hat, red flames for limbs, and a red colored face.

 ValGear 

ValGear   have a brown colored body and hat, pink flames for limbs, and a pink colored face.

 ValGearEX 

ValGearEX  have a black colored body and hat, black flames for limbs, and a dark colored face.

Trivia
In Mr. Match's scenario in Mega Man Battle Network 4, it's shown that a VolGear is responsible for working the hot-dog fryer near DenDome.