Magneaker

 Magneaker is a virus from the Mega Man Battle Network series. They travel on all fours and shoot out electric bombs from their heads at their targets. If the bomb hits its target, the target will be stunned for a short period of time. Variants' bombs stun longer as their levels increase. The virus also dashes like a Fishy virus except slower.

Magneaker
 Magneakers are green with yellow abdomens.

Magmacker
 Magmackers are yellow with purple abdomens.

Magnoid
 Magnoids are black with silver abdomens.

Source
Sprite images found at Sprites INC