Zack

Zack is one of two protagonists in JumpStart Adventures 6th Grade: Mission Earthquest, the other being his sister Jess. He also appears in JumpStart Spy Masters: Unmask the Prankster, JumpStart Spy Masters: Max Strikes Back, and JumpStart Adventure Challenge. He is depicted as a member of EarthQuest and the Spy Masters.

Appearance
Zack is a blonde-haired boy. In 6th Grade, he has spiky, unkempt-looking hair, while in the Spy Masters games, his hair is smooth and combed. He wears sci-fi utility gloves in both 6th Grade and Adventure Challenge.

Personality
In 6th Grade, Zack seems to have a more aggressive, less calculating attitude than his sister Jess. He often makes jokes and teasing or mocking comments.

In the Spy Masters games, he retains his fondness for humor, but seems to have a very laid-back personality. He seems more sensible and less likely to get worked up about things.