Boo Biscuit

Boo Biscuit is an item found in Mario & Luigi: Dream Team. It's a Boo-shaped cookie like item. Using it in battle will make Mario and Luigi invincible for a short time. However, they will not be able to attack until the effect wears off. Also, counter attacks will not do damage on enemies at all. This item is useful if the player wants to practice countering enemies' attacks.