He first appeared in a flashback in Iris and Excadrill Against the Dragon Buster!. When Iris' Excadrill reached its 99th win, Iris got cocky and clallenged Drayden, saying it would be great for her to achieve her 100th win and beat a Dragon Master at the same time. Excadrill's attacks had no effect, and he realized that he had no chance, but Iris kept on pushing him, but he was easily crushed by a single Rock Smash.
When Iris rechallenges Drayden in BW103, Haxourus is his first choice. Iris' Excadrill battles him once again. Haxorus stays strong and is hit with all of her attacks, though he does take some damage from Excadrill's improved arsenal and Iris's improved skill. When Iris orders Drill Run, he finally acts and orders Giga Impact. Haxourus's overwhelming power does it again, and the inffective move knocks Excadrill out, though Haxourus is also knocked out.