Doc Waruyama sending the submarine after Pulseman.
The boss of the Pulseman Stage 6: Australia is a super strong submarine holding a fish-like gun, which fires three bullets at a time. Doc Waruyama sends the recently created submarine after Pulseman to fight against him in the ocean floor. As Pulseman is underwater, he is in disadvantage as he can't use his electric powers. However, he can punch the small enemies that appear in the area in the submarine's direction to damage it.