A month or so ago I discovered the rubber duck costume piece and that set me off on a path of duck-pun characters on Excelsior.
The origin story for all of the charcaters begins in a toy store in Steel Canyon which was caught in the crossfire of a CoT and Clockwork battle that took place during a Rikti Raid. The store was destroyed by mystical and Rikti energy, but the combined forces granted the toy ducks sentience and super powers. They used the scrap parts from the destroyed Clockwork to build themselves bodies. Some decided to fight for good while others turned to evil and fled to the Rogue Isles.
I don't recall the power sets for each of them, but the list consists of:
The Mighty Duck (not really a pun, but a nice find. He is the main/Superman-ish hero duck)
Mallard Killmore (name based on President Millard Filmore if it's not obvious. He's the main villain duck)
Quacksilver (a speedster)
Duck of the Irish (would have preferred Lucky Duck, but alas, not available)
L'il Miss Firequacker (would have preferred just plain Firequacker, but again, it was taken)
The Quacken (whose battle cry is: "Welease the Quacken!")
Thunderduck (whose theme song is AC/DC's Thunderstruck)
Quackenstein (a Frankenstein's monster-esque tank)
Duck a l'Strange (Mallard of the Mystic Arts with a name based on the dish duck a l'orange and Doctor Strange)
Clubber Duckie (a war mace brute)
Bubble 'n Squeak (a squeaky toy with sonic powers)
Duck Duck Zeus (a weather-controller)