From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Nicktoons (formerly called Nicktoons TV and Nicktoons Network) is an American digital cable and satellite television network owned by Viacom. It is a sister service of the Nickelodeon cable channel. The network broadcasts Nickelodeon's animated series, Nicktoons, along with other original animated series and foreign animation from other Nickelodeon networks overseas 24 hours a day. The current network slogan is "Big Stars, Animated."
Nicktoons aired Dragon Ball Z Kai episodes, which made their English premiere on Nicktoons. Dragon Ball Z Kai first aired on Nicktoons on May 25, 2011 and the final episode aired on January 1, 2012. Nicktoons started airing Dragon Ball Z films on September 14, 2011 with Dragon Ball Z: Broly: The Legendary Super Saiyan. Nicktoons aired Dragon Ball GT on January 16, 2012 at 7PM/EST.