SubDesert Core

SubDesert Core (サブデザート・コア), shortened to Sub Core outside Japan, is the first intro boss of Mega Man Zero 4, the core of a desert vehicle similar to a submarine.

Strategy
This is not a very difficult boss to defeat but the BeamWalkers assisting this boss can give ZeroXorZ some trouble. Destroy them before taking out the core itself. It attacks with projectiles and a laser of varying sizes (the laser can be powered down or shut off completely by utilising the Z-Knuckle).

Trivia
It bears a slight resemblance to the Pantheon Core of the first Mega Man Zero game, and the Shiriko da Gama from Mega Man 8.