Zach

Zach is the alter ego of Gumball, and he made his first appearance in "The Name."

When Gumball learns his real name is Zach, he develops an alter ego in which he perceives himself as cool and a winner. Unfortunately, the alter ego is also a major jerk to everyone, and he nearly takes over Gumball, attempting to erase his memories as his original persona and replacing them with fabricated memories as Zach. Inside his mind, Gumball struggles against Zach, but eventually triumphs him. Zach then vanishes as Gumball writes down his own name at the town hall.