Hardhit Beetle

The Giant Hardhat Beetle (ド・ポーン, Do Pōn) is the boss of the Color Dungeon in Link's Awakening DX. Though it continually warns you to take your time, you must strike it with your sword quickly and successively for it to change colors from green to red. A more often used approach is to use your Arrows or the Magic Rod if Link has obtained it yet. The guide calls him "D. Poon"