Helmasaur King in Dark Palace
For The Legend of Zelda: A Link to the Past & Four Swords on the Game Boy Advance (GBA).

Where to find it
From the official guide
The Helmasaur King has three main attacks. Its frontal rush is easy to avoid. When it spews fireballs onto the floor, steer clear of them—they'll quickly explode. And run away when the Helmasaur King starts swinging his tail—he'll lash out at you. When you defeat the boss, you'll receive a Heart Container and a special magic crystal!
After the fight
Link, because of you, I've escaped from the clutches of the evil monsters. Thank you! ...This world was once the Golden Land where the Triforce was hidden. But because Ganon, the leader of the thieves, wished it, this world was transformed... I'm sure he's intending to conquer even our Light World after building his power here. His hope is to use us maidens and the power of the sages that has been passed on to us as the key to open a larger gate between the worlds near Hyrule Castle. But the gate is not completely open yet... There is still time. Together, we seven maidens can break the barrier that protects Ganon's hiding place. I can tell you where the other girls are held. I believe you will destroy Ganon. I will return to my original form at that time. ... ... ... ... ...
Said by: Crystal Maidens
What Link wins
Numbers
| Hit points | 48 |
|---|---|
| 2 hearts | |
| 1 heart | |
| ½ heart |
Weapons
| No effect | |
| No effect | |
| 12 hits | |
| 6 hits | |
| 3 hits | |
| 3 hits | |
| 12 hits | |
| No effect | |
| 12 hits | |
| Defeats it in one hit | |
| No effect | |
| No effect | |
| No effect | |
| No effect | |
| No effect | |
| No effect |
Drops
It drops nothing.