Poison Mushroom Cookie serves as one of Dark Enchantress Cookie's underlings, performing tasks given by her Despite being under her servitude, however, Poison Mushroom Cookie appears to lack any sort of malicious intent. They are childish, sweet, and Charmin depites their half-there attitude.

They secretly play with three kids named Apple, Bell Pepper, and a sweet girl named onion... a very sweet girl named onion.

They love sharing their 'shroomies, magically mushrooms with strange properties.