Gold Egg

Gold Egg (Or Golden Egg in the PAL version) is an enemy in Mario and Luigi: Dream Team, dropped by a background Bandit in Somnom Woods if thrown with a Taunt Ball.

Battle
As you can see, they are thrown by a background Bandit and not ever encountered in the wild. When the Bandit drops it, the egg starts moving and clinking everywhere. To battle it, the player must hit the egg with their hammer when it is moving around, then it goes to the opposite side of Mario and Luigi. It has very high defence stats, but low HP. You may want to use the strongest attack you have.