Jermafenser

Helmethead (ジャーマフェンサー, Jāmafensā) is the second boss of Midoro Palace in The Adventure of Link.

Strategy
His weak point is his head, and he attacks Link by throwing fireballs at him. When Link lands a blow to his head, the armor's helmet it will come off and be replaced by another one. The detached helmet will then begin to float around and attempt to kill Link by shooting more fireballs and running into him. When Link knocks off two helmets, a white head will appear in place of them; this is Helmethead's head. For the rest of the battle, Link fights the boss while also dodging the fireballs shot by the helmets. After archieving victory in the fight, Link returns one of the Crystals to the palace.

In the Japanese version, Helmethead appears a second time as the boss of the Palace on the Sea, while Gooma doesn't appear.