Zook is a minor character who appears in Pokémon XD: Gale of Darkness. He is the only character in the games to be known as a Thug. He appears at the start of the game at Gateon Port; after Jovi, Michael's sister, ran into him, he began to threaten her with his Shadow Zangoose. However, Mr. Verich, Eldes & Ardos appeared and Ardos defeats Zook's Zangoose with his Alakazam.
Later, Michael additionally confronted Zook at the Cipher Key Lair — despite not having his Snag Machine, he beat him. He later rechallenged him after getting his machine back, only to win again. Zook then ran off to "someplace far away" where "Cipher has no influence" to escape punishment by Gorigan.