Zack

Zack used to be a trainer in Misty's gym and her right hand man. Vergil and Cole were fond of him and looked up to him. On numerous occasions, he would spend time with them, and from time to time Misty would leave the gym to him, although he was never strong enough to be considered a potential gym leader. Despite this though, he would often leave the city, either to run errands or missions for Misty, sometimes neing away for months, or sometimes to explore the sea. Whenever there was a new shipwreck found in Kanto, Misty would always contacted and Zack was the one to go to the site.

Although not as strong a s a gym leader as mentioned, Zack was still young with a lot of potential and had a remarkable connection to the sea, being able to stay underwater for two hours. He is a user of only water type pokemon.

His rival is the leader of team aqua Archie. Archie can breathe underwater, making him more proficient than Zack. Zack and Archie face off during the championship, where Zack defeats Archie. However, his pokemon are greatly wounded, and he loses the next fight (it is against a good trainer). Archie has Kyogre under his command and is a dark trainer.

He plays some role in the discover of the Silph co base south of Kanto, as he was scouting the area. He is also one of the very few people able to survive sailing the ocean.

According to Brock, Zack is one of the few people that could run a water type gym in a rebuilt Kanto, which he does afterwards, as Vergil and Cole continue their adventures, and give their blessing to Zack to rebuild the Cerulean Gym.

Zack has a manaphy in his team

His name is inspired by Jacques Cousteau.