The code word to becoming Gizmoduck is "Blatherskite" as Gyro set it up, but Fenton always says his full catchphrase "Blathering Blatherskite" to become Gizmoduck possibly because he never knew he only had to say the second word.
Introduction of Gizmoduck.
This episode (and four others) originally appeared as a tv-movie, "Super Ducktales." After it initially aired in movie format, it was split into 5 episodes for syndication.
This episode features one of the few times someone aside from Fenton Crackshell wears the Gizmoduck suit. Fenton's mom accidentally activated the suit by saying the password and wears it briefly.