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 Link to take his time, he must strike it quickly and successively for it to change colors from green to red. An often used approach is the use of Arrows or the Magic Rod if Link has obtained it yet. Another method is to equip Roc's Feather, and use it to jump over its attacks and strike it multiple times with Link's Sword.

Beating him will give Link access to a Great fairy that will offer him a blue or red Tunic.

The guide calls him "D. Poon".