is an American animated television series produced by Warner Bros.

It is the first television series in the franchise in which Frank Welker, Grey DeLisle, and Mindy Cohn respectively portrayed the voices of Scooby-Doo, Daphne, and Velma.

The series premiered on September 14, 2002, and ran for three seasons before ending on July 21, 2006.

Reruns of the series have aired on both Cartoon Network from 2003–2016 and Boomerang from 2006–2020 and since 2023 in the United States.

It takes place in the 21st century and is more "realistic" than the previous, more cartoony incarnations, and features music from contemporary genres and all-new, original sound effects to replace the classic Hanna-Barbera sound effects.

The classic formula was also frequently parodied throughout (in a manner similar to A Pup Named Scooby-Doo), including the line "And I would've gotten away with it too, if it weren't for you meddling kids."

Animation, the successor to Warner Bros. Cartoons which was the studio famous for bringing the Looney Tunes/Merrie Melodies to life, which had by this time absorbed Hanna-Barbera Productions in 2001, after being bought by Time Warner from Turner Broadcasting System since their merger on October 10, 1996.

As is the standard for other classic Hanna-Barbera properties (Yogi Bear, The Flintstones, Wacky Races, etc.

They perform the theme song (written by Rich Dickerson), and appeared as themselves in the episode "Simple Plan and the Invisible Madman".

What's New aired for three seasons on The WB Television Network's "Kids' WB" programming block as a half-hour program, before being put on an indefinite hiatus in 2005, although the last episode, "E-Scream", was aired on Cartoon Network.

[citation needed] Reruns have been shown on both Cartoon Network and its sister channel Boomerang.

Common Sense Media gave the series a three out of five stars, writing, "Parents need to know that while there aren't many life lessons to be learned from an episode of this show, kids will enjoy the antics of the Scooby gang as they stumble upon and solve mysteries.

"[11] Warner Home Video has released the entire series on DVD in Region 1.