1998

In 1998, Cartoon Network's seventh original cartoon, The Powerpuff Girls, premieres. This also shows some updates for this channel, such as Powerhouse and new introduction sequences given to the packaged theatrical shorts.

13

 * Season 2 of Cow and Chicken premieres with the episode "Fluffy the Anaconda/The Laughing Puddle/I.R. Mommy".

2

 * Cartoon Network acquires the broadcasting rights to Batman: The Animated Series from Kids’ WB and begins airing it.
 * The branding of the network transitions from Starburst (with the Checkerboard bumpers) to Powerhouse. However, the bumpers and promos from the Checkerboard and Starburst eras are still used until April.

14-15

 * Cartoon Network airs a marathon named 50 Greatest Cartoons of All Time.

1

 * A sneak preview of Beetlejuice airs from 6:00 AM to 6:00 PM.

6

 * The Bugs and Daffy Show was given a new introduction sequence, made exclusively for the network. Unlike the original intro sequence featuring the stalk Looney Tune characters appearing in front of the Checkerboard background, this new sequence is fully animated.

1

 * Cartoon Network acquires the broadcasting rights to the Japanese anime series Sailor Moon and begins airing it on the Toonami programming block.

15

 * Season 2 of Dexter's Laboratory ends with the episode "Last But Not Beast," which served as the series finale until the series returned in 2001.

11

 * Cartoon Network's 2nd animated movie programming block, Cartoon Network's Cartoon Theatre, premieres.

7

 * Season 5 of Space Ghost Coast to Coast premieres with the episode "Terminal".

31

 * Cartoon Network acquires the broadcasting rights to the Japanese anime series Dragon Ball Z and begins airing it on the Toonami programming block, leading to great ratings success.

7

 * Tom and Jerry was given a new introduction sequence, made exclusively for the network. The backgrounds were CG animated while the characters are in 2D animation.

24-25

 * Cartoon Network airs a 25 hour marathon of Scooby-Doo, titled Those Meddling Kids: 25 Hours of Doo, in 24 hours thanks to the Daylight Savings time change which added an extra hour to the day.

6

 * "Kenny and the Chimp in Diseasy Does It!," a pilot created by Mr. Warburton, premieres as part of the Cartoon Cartoon Weekend.

7

 * "Mike, Lu & Og in Crash Lancelot," a pilot created by Charles Swenson, Mikhail Shindel and Mikhail Aldashin, premieres on as part of the Cartoon Cartoon Weekend. Mike, Lu & Og was eventually picked up by Cartoon Network and premiered in 1999.

18

 * Cartoon Network's 8th original series, The Powerpuff Girls, premieres with the episode "Monkey See, Doggie Do/Mommy Fearest".