Flintheart Glomgold is Scrooge McDuck's arch-nemesis, primarily because Glomgold is jealous of Scrooge's wealth, and desperately wants to steal the title of "World's Richest Duck" from Scrooge, but so far has only managed to maintain his status as "World's Second Richest Duck" (though that title is in somewhat dispute with another of Scrooge's adversaries, John D. Rockerduck). Flintheart will attempt any possible underhanded deed in order to defeat Scrooge, and will often hire such thugs as Pete the Cat or the Beagle Boys to do his dirty work. Under Carl Barks' authorship, Glomgold hailed from South Africa, but probably due to political unrest and aparthied, his place of origin was changed to Scotland (to match Scrooge), and his residence to Duckburg in DuckTales. Flintheart Glomgold has currently joined the Fang Empire to go alongside Magica De Spell. He will appear alongside the other members either in Lion King full story, or in another project currently unidentified. He may become a no-show because of lack of clips.
That will change later on when he does show up within the Dark Dragon's newly revamped Scourge Empire, serving as the Empire's Treasurer, only to be captured by Ansem, the Seeker of Darkness, and be partially possessed by the dark lord.