"Please, Your Omnipotence, have mercy!"
— Duke Onkled
and the ruler of Gamelon. In the intro cutscene from the game, The King travels to Gamelon in order to help his cousin, whose kingdom was attacked by Ganon's forces. However, month passes and The King doesn't return, neither does Link, who departed on a rescue mission. Zelda and Impa decide to investigate the matter on their own (leaving the Hyrule castle without leadership) to ultimately expose Duke Onkled's secret collaboration with Ganon. Fari captures Duke, who then reveals the prisoners' locations.
After defeating Ganon by Zelda, The King forces Duke Onkled to "scrub all the floors in Hyrule" as a punishment for betrayal.
He's a great sniper (confirmed 5 kills in Battle 3) and a malicious camper. His skill level is equal to 135/150 (Godlike), which makes him the best gunner in this series after The King himself.
In CD-I Pokémon Tournament, it is shown that he is a good, but not outstanding, Pokémon Trainer. His team consists of a level 340 Nidoking, a level 350 Tentacruel, a level 370 Venusaur, a level 360 Gengar, a level 360 Drapion, and his trump card: a level 380 shiny Crobat nicknamed Duke Onkled Jr. All of his Pokémon share the Poison type, in keeping with Duke Onkled's theme of treachery. None of his Pokémon are at the level cap and he owns no legendaries, despite this, he was able to effortlessly defeat multiple minor characters and put up a good showing against Zelda, despite the latter using a full team of legendary Pokémon.
From the minor characters's cast. He is the 3rd strongest character ever, with 2nd and 1st position belonging to the Fairies and Smith (Mecha Smith).