Using a gadget-filled robotic suit built by Gyro Gearloose (in an attempt to avert his robots' habit of going evil by having a reliable human pilot the suit directly), friendly, naive intern Fenton Crackshell-Cabrera became a crime-fighting superhero and protector of Duckburg. In addition to the capabilities of the Gizmosuit, Gizmoduck's greatest strength is Fenton's ability to think quickly, even under stress. Good and noble to a fault, Gizmoduck has two main weaknesses: his limited control of his suit's full capacities, and Fenton's gullibility.
Interestingly, a version of Gizmoduck actually existed (albeit briefly) as early as the American Old West, when Marshall Cabrera fashioned himself a crude, steampunk-style version of the suit using discarded bits of the destroyed Steam-Powered Steeds, which had been built by a time-traveling Gyro Gearloose. It does not appear that Fenton knew of his ancestor's earlier escapade when he first took on the Gizmoduck mantle, however.
- Blathering blatherskite!
- Call me Gizmoduck!
Other (Fenton Crackshell-Cabrera):
- I'm wearing an unstable nuclear acelletron, so… we may have a tiny situation here.
- I am not your amigo. I am not a mascot, or an intern, or a fancy tool! Blathering blatherskite! I. Am. Gizmoduuuuuck!
- Hi, I'm Gizmoduck! When there's trouble, you call me!
Other (Marshall Cabrera):
- Stop in the name of the la-AA-AW!