Mashup

The Mashup era (commonly abbreviated as CN Mashup) was Cartoon Network's fourteenth branding in the US.

Mashup 1.0
The first set of Mashup's bumpers premiered on September 8, 2018. Mashup's bumpers are differently colored in each frame. The bumpers were included in next bumpers and others were aired like regular bumpers. The bumpers featured characters transitioning and morphing into other characters. Most of the bumpers ended with a star saying "You made this." and then it flipped to say "Mash-Up." There was also increased letter spacing.

Since 2020, Cartoon Network LA used this set of bumpers as "#CNFanartMashup".

Mashup 2.0
Mashup 2.0 (also known as the Dimensional 4.0 era or either the Anti-Gravity era) began on May 28, 2019, with the new "episode-specific" next bumpers that were introduced that changed depending which episode was airing came next. When there is no specific bumper, a generic next/now bumper airs instead. The episode-specific bumpers were retired on November 1st, 2019, along with all the Mashup next/now bumpers. Generic bumpers from Dimensional 1.0 air when Steven Universe is about to come on. It also replaces the ITC Lubalin Graph Bold font (last seen in New Saturdays and the Cartoon Network app) in use since the CHECK it era, though it is still used in a few instances.

The theme was a bunch of Cartoon Network characters floating around with zero gravity.

Besides a new sign-off, replacing Dimensional 1.0's, it was introduced on August 31, 2019; a 15-second version debuted on September 6th, 2019. An extended 30-second version premiered on September 11, 2019. A new sign-on made its first appearance on September 7, 2019 until they drop them on September 13, 2021, as the premiere of Cartoonito block and the said block having its own sign-on and sign-off transition. The Mashup sign-off is still retained, however.

The channel's on-screen bugs changed on February 15, 2020, during the marathon preceding the Teen Titans Go! vs. Teen Titans television premiere.

The generic voiceover from the Dimensional era was replaced by Reed LoRenzo Shannon.

Trivia

 * The website to color in frames is cartoonnetworkmashup.com.
 * It is Valentine's Day themed and no longer used for bumpers.
 * The site is currently offline.
 * It is the only era to reveal its name in a bumper.
 * Surprisingly, both YEEEAUHHHH!, Mashup and Starburst were concurrent with both the Checkerboard, Dimensional and CHECK it eras.