Mickey and Donald (Barks Timeline)
Barks' Creations-- Timeline
Mickey and Donald (Barks Timeline)

Comic Book
Title  /   First apparition panel   /   Comments
Uncle Scrooge
Dec 1947
DD FC 178
"Christmas on Bear Mountain"        (p 1, panel 7)
    Uncle Scrooge-- not so much a foil as a plot gimmick
Jan 1948 WDC&S 88 "Wintertime Wager"        (p 3, panel 3)
    Gladstone Gander-- luck starts later.
Huey, Dewey and Louie Junior Woodchucks
Feb 1951 WDC&S 125 "Operation St Bernard"        (p2, panel 2)
    The Junior Woodchucks.
The Beagle Boys
Nov 1951 WDC&S 134 "Terror of  the Beagle Boys"        (p 10, panels 5-6)
    "The terrible, terrible Beagle Boys!"
The Money Bin
Dec 1951 WDC&S 135 "The Big Bin on Killmotor Hill"        (p 1, panel 1)
    Final design for Uncle Scrooge's Money Bin.
March 1952 U$ FC 386 (# 1) "Only A Poor Old Man"
    First Uncle $crooge comic book.
    Significative elements of  Uncle Scrooge's life..
Cornelius Coot
March 1952 WDC&S 138 "Statuesque Spendthrifts"        (p , panel )
    Cornelius Coot, founder of  Duckburg-- more statues in subsequent stories, striking different poses.
May 1952 WDC&S 140 "Gladstone's Terrible Secret"
    Gyro Gearloose-- a mere extra        (p , panel )
    The only coin Gladstone ever earned through work and a shameful symbol to him (in a sense, the reverse of  Old Number One-- which did not "exist" yet)        (p , panel )
Sept 1953 U$ FC 495 (# 3) "The Round Money Bin"        (p , panel )
    Uncle Scrooge's Number One Dime
March 1954 U$ 5 "The Secret of  Atlantis"        (p , panel )
    The Junior Woodchucks Guidebook-- aka, the Book of  Knowledge
Flintheart Glomgold
Sept 1956 U$ 15 "The Second-Richest Duck"        (p , panel )
    Flintheart Glomgold-- barely used in European stories
Sept 1956 U$ 15 "The Cat Box" (GG filler)        (p , panel )
    Little Helper
Magica De Spell
June 1961 U$ 36 "The Midas Touch"        (p , panel )
    Magica De Spell
John D. Rockerduck
Dec 1961 WDC&S 255 "Boat Buster"        (p , panel )
    John D. Rockerduck-- Uncle Scrooge's rival in European stories, instead of  Flintheart