GearBank

Gear Bank is an enemy from Mega Man Zero 4. He appears as a sub-boss of Fenri Lunaedge's stage. He has 4 "mouths". Each mouth spits out a stream of gears that follow you, hence the name GearBank. The more you damge it, the faster the gears run at you. You have to destroy all 4 mouths to defeat it. The gears that it spits out can drop parts.