The Legend of Zelda: Link's Awakening DX Cheats

Anytime you have the Hookshot equipped, if an enemy comes toward you, or it launches a projectile at you, simply use the Hookshot and as it launches out, the enemy/projectile will go straight through you, and you will take no damage.

In the color dungeon, there are tiles that when on them you bounce around and they turn from green to yellow to red and then a hole appears. If you walk over them with a pot in your hands, you will not bounce and will just walk across it, without changing the color of the tiles.