In 1991, Nicktoons was originally launched as a programming block on Nickelodeon, airing animated series. The block lasted until 2002. Nicktoons was launched as a standalone channel on May 1, 2002, as Nicktoons TV, part of the digital cable-exclusive MTV Digital Suite, in order to entice cable operators to pick up the network and give them a marketing advantage over satellite services. However, by early 2004, Nickelodeon management changed course and offered it to digital satellite servicesDirecTV and Dish Network. The network was originally marketed as commercial-free, with comedic promos involving Nickelodeon Animation Studios, two-minute cartoon shorts from foreign markets, and former program promotions which had previously been used on Nickelodeon taking up commercial time. By June 6, 2005, as the network's distribution increased, the network began to carry regular advertising. On September 28, 2009, the network's logo changed as part of Nickelodeon's universal rebranding effort that also saw Nickelodeon's first logo change in 25 years, and name changes for sister networks: The N to TeenNick and Noggin to Nick Jr. An HD feed was launched on August 13, 2013, and is available on several providers. Like Viacom's other HD channels, any programming produced in 4:3 SD is pillarboxed on this feed. As the network has blended in more Nickelodeon programming into its schedule, the Nicktoons website was sunsetted, recommending viewers go to Nick.com instead before eventually being fully redirected to the Nick.com domain.
Programming
Despite the channel's name, Nicktoons is not exclusively limited to airing Nicktoons, Nickelodeon's branding for its original animated television series. The channel has engaged in channel drift throughout its existence, increasingly adding action-oriented programming that was never seen on Nickelodeon, and even live-action programs in recent years. Like sister network TeenNick, it is also used as a 'burn off' channel for failed or low-rated series previously ordered for and airing on the main Nickelodeon network, along with outside series popular in overseas markets where Viacom is required to purchase worldwide rights for, but are not expected to rate well in the United States.
NickSports
On September 3, 2014, a two-hour Wednesday prime time programming block named NickSports was launched on the channel, tying into the Kids' Choice Sports inaugurated that year. The block presented mainly licensed programming focusing on sports, including the Rob Dyrdek-starring Wild Grinders and , along with sports-related feature films such as Bend It Like Beckham, Cool Runnings, and Space Jam. Sometime in 2015, the block was moved to a Friday prime time slot. The block ended in September 2018.
Nick HD+ is the Indian Pay TV channel which airs many Nickelodeon animated series from Nickelodeon Animation Studio. It airs all the Nicktoons programming and similar to Nicktoons channel. More than 40 of the Nickelodeon animated series were available on Voot streaming service.
Mascot
From 2006 until 2009, Nicktoons Network used a robot mascot in bumpers and advertisements for the channel. The mascot, named "ACOW," which stands for Animation Capital of the World was a complex robot character with a large singular eye, animated using "photo-puppetry." ACOW was prominently featured on the NicktoonsNetwork.com website and was used as part of the "Nicktoons Network: Animation Capital of the World" logo. Several similar-looking eyeball-based characters were seen in promos for the network.