[citation needed] The name is a portmanteau of "toon" and the Japanese term banzai, reflecting the majority of anime programming on the block.

Since October 4, 2014, the only 4Kids' shows that still air on broadcast television are Pokémon, Yu-Gi-Oh!, TMNT, and Sonic X. Vortexx ended its run on September 27, 2014, and was replaced by Litton Entertainment's One Magnificent Morning.

On October 2, 2007, The CW announced due to a joint decision between the network's parent companies Time Warner and CBS Corporation that it would discontinue the Kids' WB programming block, due to the effects of children's advertising limits and competition from cable television, and sell the programming time to 4Kids Entertainment.

[5][6] On June 26, 2012, Kidsco Media Ventures, an affiliate of Saban Capital Group, finalized a bid to acquire 4Kids' agreement with The CW for the block.

Zexal, Sonic X, and Dragon Ball Z Kai continued to air on the block until September 27, 2014, when Vortexx ended its run.