Fenton Crackshell, also known as GizmoDuck, first appeared on DuckTales as a literal bean counter, but he quit that job to work for Scrooge McDuck as his accountant. The character was voiced by the late Hamilton Camp. Fenton's ambitious ideas and hasty decision-making create serious problems for his boss. He is doggedly determined to make amends each time by any means necessary, which can create even more complications until he ultimately succeeds, although this requires a large amount of patience with him.
Later on, Fenton finds a robot suit called GizmoDuck made by Gyro Gearloose. The code word to activate it is "Blatherskite", a word which Gyro assumes no normal person would use. (Unbeknownst to him, one of Fenton's most frequently used sayings was "blathering blatherskite".) As fate would have it, Fenton wanders too close to the suit and utters his favorite expression, thus gaining a secret identity as a superhero. From then on, Fenton always uses "blathering blatherskite" to become Gizmoduck, despite only needing the second word — it is possible that Fenton failed to realize he does not have to say the entire phrase, since Gyro was the only one present when he activated the phrase. This was further reinforced when his mother's remote control caused all the Gizmoduck armor to fall off Fenton, and attach itself to her when she mentioned the word blatherskite as part of her phrase "blathering blatherskite". Fenton's self discovery as how to attach and disattach the armor served to show another of his savant abilities; he realized one of the words his mother spoke acted as a key code and repeated her last few sentences verbatim to find it; his memorization skills are outstanding.
The only characters privileged to know that Fenton is GizmoDuck are Scrooge McDuck Launchpad McQuack, who hears Scrooge reveal his identity after being saved, and Fenton's mother, whom he refers to as M'ma. His mother usually wears a bathrobe and watches television in a rundown trailer, where she lives with her son (and sometimes serves as GizmoDuck as she has the same favorite exclamation as her son). Fenton is in love with Gandra Dee, Scrooge's bean factory receptionist. As Fenton, he is Scrooge's accountant, but as GizmoDuck, he is chief security guard for the money bin and Scrooge's personal bodyguard.