Armos

For The Legend of Zelda: A Link to the Past on the Super Nintendo (SNES).

Where it is

Eastern Palace

From the official guides

Stone statues in the garden of the Eastern Palace. When Link comes close they come to life and ram him, hopping in small bounces. Corner one against a wall and keep slashing with the sword.

ファミコン通信編集部責任編集ゼルダの伝説神々のトライフォースのすべてがわかる本 (アスキー, 1992), p. 100, translated by 101Leafy

A statue-like enemy near the Eastern Palace. When Link comes close it moves as if it came to life. Stop it with the boomerang.

任天堂公式ガイドブックゼルダの伝説神々のトライフォース上巻 (小学館, 1992), p. 126, translated by 101Leafy

Numbers

Hit points	8
Damage to Link, Green Mail	½ heart
Damage to Link, Blue Mail	½ heart
Damage to Link, Red Mail	½ heart

Weapons

Boomerang	Stuns it
Fighter's Sword	4 hits
Master Sword	2 hits
Tempered Sword	1 hit
Golden Sword	1 hit
Golden Sword spin attack	1 hit
Arrows	1 hit
Hook Shot	Stuns it
Bombs	2 hits
Silver Arrows	Defeats it in one hit
Magic Powder	No effect
Fire Rod	1 hit
Ice Rod	Freezes it
Bombos Medallion	Burns it
Ether Medallion	1 hit
Quake Medallion	Stuns it