Kiyo Takamine and Zatch Bell
Kiyo Takamine, known in the original version as and his "Mamodo" (known in Japanese as a ) partner Zatch Bell, known in the original version as , are fictional characters in the anime and manga franchise "Zatch Bell!" by Makoto Raiku. Mamodos are beings from another world with supernatural powers. The series begins when Kiyo, by the request of his father, is told to take care of Zatch. Eventually, they become involved in a tournament between Mamodos where the winner becomes king of the Mamodo World.
JumpStart Adventures 6th Grade: Mission Earthquest
"JumpStart 6th Grade" is now part of a 5-disc set called "JumpStart Advanced 4th-6th Grade", along with , , and two bonus discs.Zack is a male human with blond hair and is one of the main characters in the game. Although clearly not mean, Zack seems to have a bit more "attitude" then Jess and is rude on a few occasions. He also appeared in , JumpStart SpyMasters: Max Strikes Back, and "Adventure Challenge" (also called Far-Out Field Trips, Ultimate Field Trips, and Extreme Field Trips), all in which he does not seem as rude as he does in his original appearance.
Jess is Zack's twin sister and one of the main characters. Her hair is short and red and she doesn't seem to have as much attitude as Zack. Like her brother, she has appeared in , JumpStart SpyMasters: Max Strikes Back, and "Adventure Challenge". 
Uncle Eli is one of the main characters. Intelligent, with gray hair, and wearing a green shirt and glasses, he helps Zack and Jess in different ways to accomplish their missions.
A dog, Roswell is blue in color and helps capture A.R.T.'s robots before they are taken to the Robot Re-Organizer.
A brown-colored monkey, Enos was sent on a rocket ship with A.R.T. at the start of the game - before A.R.T. even caused trouble - because the human astronauts were asking for too much money. However, while in space, A.R.T. told Enos that "there's been a change of plans" and that he would use robots to redesign Earth, in which Enos promptly freaked out in response to and pressed the S.O.S. button. This apparently ended up sending an image of him and A.R.T. to Earthquest. Uncle Eli then told Jess & Zack about A.R.T., and the adventure began.
The main villain, A.R.T. is a computer with artificial intelligence who desires to redesign Earth using robotic menaces than Zack and Jess are to conquer. He is said to have evil logic.To save the world and complete the game, the user must go on missions by choosing one from the Mission Locator Map. At the start of each mission, the user must choose either Zack or Jess to be their partner. There are six different game types. After one type of game is completed, the user captures one of A.R.T.'s robots and take them to the Robot Re-Organizer. Once all the robots are captured and reorganized, then the game is completed. After a type of game is completed, the user may continue to play that type of game, though it will not bring them closer to the end. Each type of game has three places in the world where they may be played.