Pop was originally launched on 29 May 2003 by Chart Show Channels (CSC) Media Group as Toons&Tunes. Toons&Tunes was then later rebranded as its current name, Pop (formerly stylized as pop and POP!) in the following month.

In the channel's early years, links were presented by Rorry, a lime green dragon with a Scottish accent, who was animated live. He was accompanied by Purrdy, a dragon/cat hybrid who also appeared in the original Tricky programme on ITV1, it was sometimes followed by a programme known as "The Cheeky Monkey Show" which features the live links of the animated coloured monkeys known as "The Cheeky Monkeys," that was later known by appearing on its sister channel Tiny Pop until its retirement at the end of June 2009.

Originally, the network focused on music videos with animated programming also part of the schedule, but with the numerous music video network options on British television at the time, this focus was quickly abandoned in 2004, when the animated content became much more prominent. Music videos continued to be carried on and off until 2010, before eventually being abandoned entirely.[citation needed, In 2010, Pop had several popular shows, such as The Smurfs, GoGoRiki, Oggy and the Cockroaches, etc.

In 2012, Pop introduces semi-mascots known as the MoonGoons, These are animal-like aliens, with the 2 main ones being a blue squid named Boofus and an orange rabbit named Diggle, These were gone by the time of the channel's next rebrand in 2015, Also in 2014 CSC Media Group had folded into Sony.

On 1 September 2020, Pop rebranded its on-air identity, with the premiere of Bakugan: Armored Alliance. And on the same day, starting with Pokémon Journeys: The Series, the network became the new British home of the Pokémon anime, moving from its previous broadcasters, ITV1 and CITV, of over 20 years. The channel was also sold by Sony to Narrative Entertainment

On 9 November 2022, Narrative Entertainment announced the launch of a new FAST channel, Pop Kids, to stream on Samsung TV Plus, the new FAST network airs shows from Pop and Tiny Pop.

Sometime in 2022, Pop began to branch into YouTube content, as they approached Joe Tasker for a new show called Swipe It! With Joe Taker, they would later acquire from content creators to use on their channel, including LankyBox, Denis and EthanGamer (the latter exclusively airing on Pop Player).

By 2023 Alvin & the Chipmunks, Squish, Miraculous Ladybug and Pokemon were among the channels popular shows, 

Now here is when things start to diverge from the real world, In June 2023 (in my alternate universe) the channel was sold to UKTV, In September the channel introduced Toonattik, a revival of the CITV programming block of the same name, Write a blog post in November 2023 where Pop announce changes, including a revamped Toonattik, which will  have a boys vs girls theme, getting Pied in the face, and competing in a colourful attic, This is teased at the end of Saturdays show with tons of glitches, accompanied by a blue tentacle and orange ear popping from above the roof before dissaperaing, and the announcer saying "Who are those creatures in the attic? Come to think of it, Is there really an attic? Will Jamie and Anna be safe stood underneath it untill tomorrow? Come back at 7am tomorrow for more Toonattik"