Quack is the deuteragonist of Zack & Quack.
Quack is Zack's best friend and trusted sidekick. This uber-curious young duck is fascinated by the pop-up world. He never backs down from a challenge and is full of boundless slapstick energy. Quack never knows what is going to pop up, but that's part of the fun; he loves to be surprised and loves to explore with Zack!
Quack is mostly light blue. Several of the feathers on his wings are white. He has an orange beak and orange legs.
Quack appears in every episode of Zack & Quack. He debuted in "Pop-Up Speedway" and was last seen in "Pop-Up Posse to the Rescue."