Flintheart Glomgold is the rival of Scrooge McDuck in the 2017 version of DuckTales Series. Rival to Scrooge, and is the second richest businessman in the world.
Flintheart is a ruthless businessman. A direct contrast to Scrooge in his methods, Flintheart will gladly lie and cheat his way to victory, with little care for anyone. He sees all other individuals as nothing more than tools for succeeding in his goals. He will gladly feign loyalty to someone if he believes that they can lead him to whatever treasure he may be hunting at the time. Flintheart wants to be better at Scrooge at everything, but when that doesn't play out the way he wishes he turn to murder. Flintheart often tries to kills Scrooge and anyone else that infuriates him like Mark Beaks.
Flintheart seeks out the legendary lost city of Atlantis, and hires some cheap bodyguards, including Donald, to aid him in his quest. When he discovers Scrooge McDuck and his nephews on the same quest, he decides to follow them. After Donald inadvertently leads them to them in the treasure room, Flintheart steals a large gem and uses Donald as bait to escape. He also leaves his bodyguards behind, valuing the gem more.
When he arrives back in Duckburg, he tries to speak with the news about his finding, only for Scrooge to turn up with the real gem in tow. Flintheart soon discovers that the gem he grabbed was cursed, as a large tentacle snatches him up from the water. As he is dragged away, he curses Scrooge.
Flintheart makes a cameo in this episode on Ottoman Empire, a reality series in which he requests the hosts to build him an ottoman but rejects their initial attempt when it doesn't have his face on it. They make another one for him with his face on it, but he also rejects it because he does not want to put his feet on a picture of his own face.
Flintheart tries to trick Scrooge by making a plan for killing Mark Beaks on a cruise ship in a volcano, but Scrooge refuses since he doesn't want to kill Mark Beaks. He later finds an extra slideshow called "Backstabbing Scrooge Version 3", where Scrooge later finds out that he would also die in the same volcano due to his portion of a bridge breaking. Scrooge later leaves Flintheart by himself. However, Flintheart goes on with the plan to kill Mark Beaks by delivering him a fake invitation to a "billionaires cruise" in a mailman outfit.
There are implications he's actually a South African pretending to be Scottish.