Stacy is an excitable badger seen in the episode badger pride of The Penguins of Madagascar. She is either friends or sisters with Becky (it is never stated which).
In the episode Badger Pride, she and Becky befriend Marlene, and Private. Private is originally fearful of badgers, but Stacy helps win his heart by giving him a Peanut Butter Winkie.
After a fun day, Stacy and Becky start badgering Marlene to do wild and crazy things with them. Eventually, Marlene becomes so fed up, she tells them to stop badgering her. Unfortunatley, badgers do not take kindly to badger stereotyping, so Becky and Stacy start chasing her around, telling her that when they're finished, her own mother wont be able to recognize her.
Stacy and Backy are defeated when they and Marlene fall into the park, causing Marlene to turn into her feral self. She is notably used as a boomerang by Marlene against Becky.