Duck "Bill" Platypus is a student at the Conservatory of Sorcery in Atlantis.
Bill is a teal platypus with a darker bill, tail and front. His tuft of hair ends in orange tips. Originally, he wore shoes similar to those of Sonic, featuring a yellow stripe, in purple or red (though he was sometimes drawn with generic red/brown gloves and boots), as well as a simple headband featuring a buckle. In most of his original depictions, his body was stout, largely lacking distinction between his head and torso. In later appearances, he wears an Eggman-styled uniform, though in purple rather than Eggman's red, as well as goggles. His hair has become spikier and more distinct and the proportions and shape of his body have been redefined to better fit in theme. His fishtail is fully green.
- 1996: Bill is born.
- 2005: Met Barby
- 2010: Joins Justice League of Atlantis
- Breathe Underwater (sometimes)
- Gills on his neck
- Can feed drowning victim oxygen (sometimes)
- Enhanced Strength
- Underwater Respiration
- Able to turn his legs into a fish tail and back at will
- Fast Swimmer
- Underwater Pressure Resistance
- Can see in the dark
- Bill is part-Atlantean, meaning sometimes he's unable to breath underwater. This will change in New Cartoon Network.
- Bill is able to go under 500 meters underwater under one breath.