Hooley Krekk was a male Yuuzhan Vong Warmaster. He was born in a worldship, Coria's Judgment, in the Yuuzhan Vong's home galaxy.
After the first attack on Zonama Sekot, he encouraged Quoreal to continue the invasion of the Galaxy. But Quoreal would have none of that, as he viewed Sekot as the Yuuzhan Vong's omen of death. Hooley Krekk did not like his Supreme Overlord's decision and attempted a coup, but was defeated by loyal Yuuzhan Vong forces. In desperation, he left his family behind (including his son, who shares his name, Hooley Krek) and with his loyal forces began attacking the Galaxy's Outer Rim, in 17 BBY.
His first documented attack was on the Ottiumigons of the Ottiumigos Centrality. If not for the intervention of renegade Jedi, Nathaniel Kenobi, his wife, Abigaile Jade, and Clone Commander, Alpha, the Ottiumigons would have been utterly destroyed.
Hooley Krekk later captured the Kaminoan Prime Minsiter, Lama Su, after his Stealth-Arc's cloak had failed and subjected him to torture. Lama's companions landed on the planet where he was being held captive and Nathan attempted to free him.
Hooley Krekk then ordered his top aide to attack the Kaminoan planet Novus Kamino Prime. After the order was sent he attacked Nathan with two amphistaffs, so that he could counter Nathan's two lightsabers. After his arms and legs had been decapitated in the fight, Hooley Krekk shouted a curse that would affect Nathan's family for a couple generations. In it he stated that his family would lose valued members, they would be forced to wander, and would never return to the place of their birth again.
Luckily, Nathan was able to convince the mad Yuuzhan Vong to surrender and to call off his forces. They signed the Treaty of Novus Kamino Prime and as a result were "exiled" from the system. He returned to Quoreal to accept his judgment, but was saved by Shimrra, who wanted to be Supreme Overlord and helped Hooley Krekk survive.
After the death of his wife on Wayland, Nathan encountered Hooley Krekk one more time. When the Yuuzhan Vong were attacking the Chiss, and Nathan was helping them to defend themselves. As was later stated by his son, "They say he met a foe from his past. The one who forced him to come back into the fold. He battled him from the beginning of the day, to the end of night. He was killed by his mysterious foe and I have been shamed of it happening ever since."