Flintheart Glomgold

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 or the Beagle Boys to do his dirty work. Under Carl Barks' authorship, Glomgold hailed from South Africa, where he made his fortune in diamond mining. However, when he debuted in DuckTales, it had been during the 1980s and the U.S. government had tensions with the Republic of South Africa. Wishing to avoid controversy, as South Africa had been associated with apartheid and not with diamonds at that time, the Disney animators changed Glomgold's nationality from South African to Scottish. Another departure from the comics was that Glomgold is also notoriously stingy as is Scrooge, but even more so, whereas Scrooge at least will be generous with his money on occasion. The animated Glomgold was shown as a big spender. This may have been an amalgamation of another one of Scrooge's rivals, John Rockerduck, who was never shown in Ducktales.

The animated Flintheart Glomgold was voiced by Hal Smith.

Personality
Selfish, dishonest and incredibly greedy. His goal is to become the world's richest duck but the thing that makes him such a cruel duck is the fact that he'll cross every line to achieve this. Even to the point were he might even try to murder Scrooge. He cares for no one other than himself acting as a loner at some points. In the comics Glomgold wears an ascot and black coat. This shows how different Flintheart really is from Scrooge. Unlike Scrooge who does not believe in obtaining money through dishonesty, which has resulted in having many loved ones, Flintheart makes immoral decisions, which has resulted in him not having any emotional ties to any possible friends or family members. In Ducktales, he wore a kilt, tartan and tam o'shanter. In the comics he owns a money bin that mirrors Scrooge's, however it is in the middle of a South African jungle as opposed to Scrooge's which is in the center of Duckburg. While Scrooge's money bin is almost all cash, Glomgold's is a mix of cash and precious gems, particularly diamonds.

DuckTales
Glomgold serves as the main antagonist of the series making recurring appearances all major voiced by Hal Smith. Like the comics, Glomgold is trying his best in becoming the world's richest duck. He makes his series debut in the second part of the pilot, "Treasure of the Golden Suns", in which Scrooge and his nephews find a map to a sunken treasure. Glomgold teams up with a villain named El Capitan to stop McDuck and gain the treasure for themselves. He would later go on to scheme and battle McDuck in several episodes. Some of his schemes include framing Scrooge for theft and having him arrested, banishing Scrooge to a remote island through the power of a genie, or even using Scrooge's own employees to work for him. He was also given John D. Rockerduck's habit of eating his hat when defeated by Scrooge.

Darkwing Duck
Glomgold makes a cameo appearance in the Darkwing Duck episode "In Like Blunt", along with the Beagle Boys and Magica DeSpell, among the bidders for the secret S.H.U.S.H. agent list.

Video games
Glomgold made brief appearances in both of the DuckTales]] NES games. At the end of the first game, after Scrooge defeats Dracula Duck, Glomgold shows up, being airlifted by a vulture (presumably a transformed Magica De Spell), and Scrooge must climb a rope up to the treasures in order to win the game. If Glomgold reaches the treasures first, the player loses a life and has to fight Dracula Duck again. The HD remake, DuckTales Remastered, appears to expand on Glomgold's role in the game, adding in a sub-boss fight against him midway through the Himalayas level.

In DuckTales 2, after Scrooge finds all of the treasures, Glomgold takes Webby hostage and holds her for ransom on the pirate ship in the Bermuda Triangle. Scrooge gives Glomgold the treasures, only to discover that this "Glomgold" is actually a shape-shifting robot called the D-1000 programmed to destroy him. After the D-1000 is defeated, the real Glomgold sinks the ship and tries to take Scrooge and the treasures with it.