VolGear

VolGear (ボルケルギア) is a virus appearing in the games Mega Man Battle Network and Mega Man Battle Network 4. 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.

Fire Versions
VolGear

VolGear have a grey 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.

ValGear

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

VolGearEX

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

VulGearEX

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

ValGearEX/VolGearSP

ValGearEX (VolGearSP in Legend of Network) have a black colored body and hat, black flames for limbs, and a dark colored face.

Aqua Versions
VolGear2

VolGear2 (ウォルタルギア) have a light-grey colored body and hat, blue flames for limbs, and a blue colored face. They only appeared in the first 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. Higher versions are exclusively in Legend of Network.

Battle Chips
The Battle Chips obtained from the VolGear family are Fire Tower (フレイムタワー), Aqua Tower (アクアタワー), and Flame Line (フレイムライン).

Anime
VolGear and its variants make a regular appearance throughout the MegaMan NT Warrior anime series as viruses that the characters must defeat to proceed. They are often found in an army of many types of viruses, and are usually taken out within a single shot.

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.