Zach Watterson is the ego of Gumball Watterson,who appeared in an episode called 'The Name'.When Gumball remembered that his name is Zack,Zack started to take over his mind.He started showing off and naughty.Soon,he went to far and the Wattersons went to change his name to 'Gumball Watterson',destroying Zack once and for all.

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