|“||It's generally advisable to keep a safe distance from molten magma, which is why the Monsters are stumped that anyone could have gotten close enough to carve a mini-volcano out of Earth Island's crust. The noxious green fumes that encircle Mirror Earth Island may well be a consequence of the volcano's construction and tampering with the natural order - but it's equally possible that they represent an apparent harmony between Earth and Poison.||”|
Mirror Earth Island is the 5th Mirror Island. It can be bought for 500 when the player has reached Level 20.
- Like the other Mirror Islands, it holds a resemblance to its ethereal, that being the green cracks along the island floor, representing the Humbug.
- All Monsters and Decorations from Earth Island can be placed on Mirror Earth Island.
- Due to it's price of a whopping 500 diamonds, Mirror earth island can be considered the most costly island in the entire game (excluding Island Skins.)