Billy (virus)

Billy (ビリー) is a virus from the Mega Man Battle Network series. Their appearance is that of a ball with eyes, stubby feet, probe-like arms and a lighting bolt protruding out of the back of their head. When in battle, these viruses move around by one panel in random directions. After a set amount of moves, they begin their attack by clenching their thin needle arms and releasing a slow-moving, homming electric ball that floats toward the player for a set duration of time. If hit, they cause the player to be paralyzed for a brief moment and stunned for a bit longer. When stunned, everytime the player moves one panel, their motion is interrupted to deliver a quick shock, dealing 10HP of damage. After a few seconds wandering around after the player, the ball disappears; upon moving a set amount of squares, the viruses repeat this attack pattern. Stronger variants release faster and more damaging electric balls.

Billy
Billy is a variant with yellow colored balls on two feet, with two prongs for arms, and a lightning bolt protruding from their head. They have dark-red eyes.

BillyEX
BillyEX is a variant with green colored balls on two feet, with two prongs for arms, and a lightning bolt protruding from their head. They have red eyes.

Billy2/Silly
Billy2/Silly is a variant with red colored balls on two feet, with two prongs for arms, and a lightning bolt protruding from their head. They have blue eyes.

SillyEX
SillyEX is a variant with blue colored balls on two feet, with two prongs for arms, and a lightning bolt protruding from their head. They have red eyes.

Billy3/Killy
Billy3/Killy is a variant with grey colored balls on two feet, with two prongs for arms, and a lightning bolt protruding from their head. They have red eyes.

KillyEX
KillyEX is a variant with pink colored balls on two feet, with two prongs for arms, and a lightning bolt protruding from their head. They have green eyes.

Battle Chips
Thunder, known as Thunder Ball (サンダーボール) in Japan, is the Battle Chip from Billy viruses.

Other Media
Billys appears in the MegaMan NT Warrior anime series.