The Millennium Age of Animation begins.
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2000
- 3-2-1 Penguins!
- Action Man (2000)
- Argai: The Prophecy
- A Miss Mallard Mystery
- Aqua Teen Hunger Force
- As Told by Ginger had most of its run in this decade.
- Baby Blues
- The Baskervilles
- The Brak Show
- Buzz Lightyear of Star Command
- Clerks: The Animated Series
- D'Myna Leagues
- Dora the Explorer
- Eckhart
- Ethelbert the Tiger
- For Better or for Worse
- George Shrinks
- Generation O!
- God, the Devil and Bob
- Harvey Birdman, Attorney at Law
- The Intruder. Toonami Immersion Event.
- Jackie Chan Adventures
- Kong: The Animated Series
- Maggie and the Ferocious Beast
- The Magic Key
- Mamemo
- Marsupilami
- Marvin the Tap-Dancing Horse
- Max Steel
- The New Adventures of Ocean Girl (2000)
- Pelswick
- Pigs Next Door
- Poochini
- Rainbow Fish
- Seven Little Monsters
- Sheep in the Big City
- Spy Groove
- Static Shock
- Teacher's Pet
- Timothy Goes to School
- Treasure
- The Twins (2000)
- The Ugly Duckling 2000
- The Weekenders
- What About Mimi?
- Wheel Squad
- Wunschpunsch
- X-Men: Evolution
2001
- 2DTV
- Aaagh! It's the Mr. Hell Show!
- Alienators: Evolution Continues
- Animated Tales of the World
- Anne of Green Gables: The Animated Series
- The Bellflower Bunnies
- Braceface
- Capelito
- Chris Colorado
- Committed
- The Fairly OddParents!: Started as a series of cartoon shorts in 1998, but became a regular series in 2001.
- Gadget and the Gadgetinis
- Gloria's House
- Grim & Evil
- Invader Zim
- John Callahan's Quads!
- Justice League
- The Legend of Tarzan
- Lloyd in Space
- Mire Bala Kale Hin (2001-2003)
- The Mummy: The Animated Series (2001-2003)
- The New Adventures of Lucky Luke
- The Oblongs
- Oswald (2001–2003)
- The Proud Family
- The Ripping Friends
- Sagwa, the Chinese Siamese Cat
- Samurai Jack
- Sealab 2021
- Simplemente Rita
- Sitting Ducks
- Stanley
- Stick Girl
- Time Squad
- Tiny Planets (2001-2002)
- The Tool Street Gang
- Ultimate Book of Spells
- Undergrads
- Untalkative Bunny
- What's with Andy?
- Yvon of the Yukon
- The Zeta Project
2002
- 3-South
- The Adventures of Jimmy Neutron, Boy Genius
- Angelina Ballerina
- Audrey and Friends
- Baby Looney Tunes
- The Berenstain Bears (2002 series)
- Butt-Ugly Martians
- ChalkZone
- Clone High
- Codename: Kids Next Door
- The Cramp Twins
- Cyberchase
- Daft Planet
- Doodlez
- Edward
- Fillmore!
- Fred the Caveman
- Girlstuff/Boystuff
- Globehunters: An Around The World In 80 Days Adventure
- God Rocks!
- Groove Squad
- Harold and the Purple Crayon
- Henry's World
- Kaput & Zosky
- Kim Possible
- The Lost World
- Max and Ruby
- Moville Mysteries (2002-2003)
- Mr. Bean: The Animated Series (2002-2004, 2014-2019)
- ¡Mucha Lucha! (2002-2005)
- My Life as a Teenage Robot
- Olliver's Adventures (2002-2005)
- Ozzy & Drix
- Phantom Investigators
- Pig City
- Roboroach
- Scruff
- Simon in the Land of Chalk Drawings (2002)
- Spaced Out
- Stargate Infinity
- Teamo Supremo
- Totally Spies!
- Whatever Happened to... Robot Jones?
2003
- A Treasure In My Garden
- All Grown Up!
- The Aquaman & Friends Action Hour
- Bounty Hamster
- Clifford's Puppy Days
- Code Lyoko
- Danny Phantom
- Duck Dodgers
- The Electric Piper
- Franny's Feet
- The Frog Show
- Gary the Rat
- Horrible Histories
- I Spy
- Jacob Two-Two
- Jakers! The Adventures of Piggley Winks
- JoJo's Circus
- Juro Que Vi (first short released in 2003, others released in 2004, 2006 and 2008)
- Kenny the Shark
- King
- Lilo & Stitch: The Series
- Stitch! The Movie
- Leroy & Stitch (2006)
- Martin Morning
- Martin Mystery
- MechaNick
- Monkey Dust
- My Dad the Rock Star
- Postcards from Buster (Spin-Off of Arthur)
- Ratz
- Ren & Stimpy "Adult Party Cartoon"
- Rubbadubbers
- The Save-Ums!
- The Secret World of Benjamin Bear
- Silverwing: Adaptation of the novels.
- The Spaghetti Family
- Spider-Man: The New Animated Series
- Star Wars: Clone Wars (2003)
- Strawberry Shortcake. First television series.
- Stripperella
- Teen Titans (2003)
- Teenage Mutant Ninja Turtles
- Tutenstein
- VBirds
- The Venture Bros.
- Xiaolin Showdown
- Yakkity Yak
2004
- 6teen
- Angel Wars
- Atomic Betty
- The Backyardigans
- The Batman
- Brandy & Mr. Whiskers
- Bro Town
- Da Boom Crew
- Dave the Barbarian
- Delta State
- Dragon Booster
- Drawn Together
- The Eggs
- El perro y el gato
- Fatherhood
- Father of the Pride
- Foster's Home for Imaginary Friends
- Funpak
- Higglytown Heroes
- Hi Hi Puffy AmiYumi
- Lily the Witch
- Maya & Miguel
- Megas XLR
- Miss Spider's Sunny Patch Friends
- O'Grady
- Ozie Boo!
- Peep and the Big Wide World
- Peppa Pig
- Perfect Hair Forever
- Pocoyo
- Potatoes and Dragons
- Super Robot Monkey Team Hyperforce Go!
- ToddWorld
- Tom Goes to the Mayor
- The Tofus
- Tripping the Rift
- Tupu
- Villa Dulce
- Watch My Chops
- Winx Club
- W.I.T.C.H. (2004)
- Zeroman
2005
- 12 oz. Mouse
- Alpha Teens on Machines
- Alien Racers
- American Dad!
- American Dragon: Jake Long
- Avatar: The Last Airbender
- BB3B
- Being Ian
- Ben 10
- Ben 10: Alien Force (2008)
- Bird Bath
- The Boondocks
- Brady's Beasts
- Bratz. Based on the toyline.
- Bromwell High
- The Buzz on Maggie
- Camp Lazlo
- Carl²
- Catscratch
- Charlie and Lola. Adaptation of the book series.
- Class of the Titans (2005-2008)
- Coconut Fred's Fruit Salad Island
- Danger Rangers
- De Avonturen van Varkentje Rund
- Delilah & Julius
- Diego y Glot
- Elias: The Little Rescue Boat
- Fifi and the Flowertots
- Firehouse Tales
- Foot 2 Rue
- Four Eyes!
- Fudêncio e Seus Amigos (2005-2011)
- Gerry Anderson's New Captain Scarlet
- Get Ed
- Go, Diego, Go!
- Holly Hobbie and Friends
- Johnny Test
- King Arthur's Disasters
- Krypto the Superdog
- Legend Of The Dragon
- The Life and Times of Juniper Lee
- Little Einsteins
- Loonatics Unleashed
- Meteor and the Mighty Monster Trucks
- Mischief City:
- Moral Orel
- My Gym Partner's a Monkey
- Pet Alien
- Planet Sketch
- Los Pulentos
- Razzledazzle
- Robotboy
- Robot Chicken
- Rugrats Pre-School Daze (2005, 2008)
- School for Vampires
- Skyland
- Sons of Butcher
- Squidbillies
- Station X
- Sunday Pants
- Those Scurvy Rascals
- Time Warp Trio
- Toopy and Binoo
- Trollz
- The X's
- Zula Patrol
2006
- Assy McGee
- Avez-vous déjà vu... ?
- Bali
- The Bee-Bees
- Bernard
- Biker Mice from Mars (the 2006 revival)
- Binka
- Blood Tea and Red String
- Captain Flamingo
- El Chavo Animado
- City Hunters
- Clang Invasion
- Class of 3000
- Curious George. Adaptation of the book series.
- Di-Gata Defenders
- Dogstar
- Dragon Hunters
- Edebits
- The Emperor's New School
- Fantastic Four: World's Greatest Heroes
- Forest Friends (2006-2007)
- Freak Show
- Frisky Dingo
- Grossology
- Growing Up Creepie
- Handy Manny
- Horseland
- Kappa Mikey
- Legion of Super Heroes
- The Likeaballs
- Little Princess
- Lola & Virginia
- The Many Adventures Of Mr Mailman
- Metalocalypse
- Mickey Mouse Clubhouse
- Minoriteam
- MP4orce (2006)
- My Goldfish is Evil
- The Naughty Naughty Pets
- Numberjacks
- Ōban Star-Racers
- Pinky Dinky Doo
- Plastic Man
- The Replacements
- Rintindumb
- Ruby Gloom
- The Secret Show
- Shaolin Wuzang
- Shorty McShorts' Shorts
- Shuriken School
- Skatoony
- Sprout Diner
- Squirrel Boy
- Staines Down Drains
- Team Galaxy
- Thugaboo
- Viva Piñata
- W.
- Weird Years (2006-2007)
- What It's Like Being Alone
- Wonder Pets!
- Wow! Wow! Wubbzy!
- Yam Roll
- Yin Yang Yo!
- Zorro: Generation Z
2007
- The Amazing Screw-On Head: Adaptation of the comic book
- Angels of Jarm
- Animal Mechanicals
- Animalia
- Back at the Barnyard
- The Beeps
- Billy & Mandy’s Big Boogey Adventure
- Bo on the Go!
- Care Bears
- Chaotic
- Chop Socky Chooks
- Chowder
- Code Monkeys. Set in The '80s.
- Dino Squad
- Edgar & Ellen. Animated adaptation of the literary series.
- Fluffy Gardens
- The Future is Wild
- Futz!
- George of the Jungle (2007)
- Happy Monster Band
- Iggy Arbuckle
- Magi-Nation
- Mama Mirabelle's Home Movies
- My Friend Rabbit (based on the children's books)
- My Friends Tigger & Pooh
- The Nutshack
- Phineas and Ferb
- Revisioned: Tomb Raider Animated Series
- Rick & Steve: The Happiest Gay Couple in All the World
- Ricky Sprocket: Showbiz Boy
- Roary the Racing Car
- Ruby Rocket Private Detective (2007)
- Sea Princesses
- Shaun the Sheep
- Skunk Fu!
- Slacker Cats
- Storm Hawks
- Supernormal
- Super Why!
- Sushi Pack
- Tak and the Power of Juju (2007)
- El Tigre: The Adventures of Manny Rivera
- Time Jam: Valerian & Laureline (2007-2008)
- Total Drama (Island and Action premiered in this decade, the latter in 2009)
- Urban Vermin
- Wayside
- WordGirl
- WordWorld
2008
- 3rd & Bird
- A Kind of Magic (2008)
- Batman: Gotham Knight
- Batman: Mystery of the Batwoman
- Batman: The Brave and the Bold
- Ben and Holly's Little Kingdom
- Best Ed
- Bowlopolis
- The Bremen Avenue Experience
- Calling Cat 22!
- Chuggington
- Click & Clack's As the Wrench Turns
- Combo Niños
- Dex Hamilton: Alien Entomologist
- The Drinky Crow Show
- Eliot Kid
- Famous 5: On the Case
- Fred's Head
- Freefonix (2008-2009)
- The Garfield Show
- Kid vs. Kat
- Life's a Zoo
- Making Fiends
- Master Raindrop
- Martha Speaks
- The Marvelous Misadventures of Flapjack
- The Mighty B!
- Monster Buster Club
- The Mr. Men Show
- Nacho Bear
- Ni Hao, Kai-Lan
- Punch!
- Random! Cartoons
- Bravest Warriors (the original pilot; aired in 2009)
- Flavio the Goat (debuted in 2007; aired in 2009)
- Razzberry Jazzberry Jam
- Sammys Story Shop
- The Secret Saturdays
- Sid the Science Kid
- The Spectacular Spider-Man
- Speed Racer: The Next Generation
- Star Wars: The Clone Wars (2008)
- The Talented Mr. Bixby
- Three Delivery
- Toot & Puddle
- Turbo Dogs
- Wakfu
- Will and Dewitt
- Willa's Wild Life
- World of Quest
- Zeke's Pad (debuted in 2008 in Australia; 2010 in Canada)
2009
- The Amazing Spiez!
- Angel's Friends
- Archer
- Bunny Maloney (2009-2010)
- Casper's Scare School
- CJ the DJ
- The Cleveland Show
- The Daltons
- The Dating Guy
- Dinosaur Train
- Dirtgirlworld
- DJ And The Fro
- Fanboy and Chum Chum
- Fishtronaut
- Geronimo Stilton (the books' Animated Adaptation debuted in 2009)
- Glenn Martin, DDS
- Gormiti: The Lords of Nature Return
- Hot Wheels: Battle Force 5
- Iron Man: Armored Adventures
- Jamie's Got Tentacles!
- Jimmy Two-Shoes
- Jungle Junction
- League of Super Evil
- Matt's Monsters
- Monk Little Dog
- Olivia
- OOglies
- The Penguins of Madagascar
- Pixel Pinkie
- Producing Parker
- RollBots
- Special Agent Oso
- Sit Down, Shut Up
- The Space Place
- Spliced (internationally; did not debut in its native Canada until 2010)
- Stōked
- The Superhero Squad Show
- Timmy Time
- Titan Maximum
- Waybuloo
- Wolverine and the X-Men (2009)
- Wibbly Pig was in the US in 2012.
From previous decades
- 64 Zoo Lane: Had most of its run in the 2000's
- Archibald the Koala: (debuted on 1998 and ended in 2000)
- The Avengers: United They Stand (debuted in 1999)
- Batman Beyond (although it began in 1999)
- Blinky Bill (premiered in 1993, season 3 aired in 2004)
- Ed, Edd n Eddy (aired from 1999 to 2009)
- Family Guy (started in 1999, cancelled in 2002, Un-Cancelled in 2005)
- Flipper and Lopaka (1999-2005)
- Futurama (debuted in 1999, but gained most of its following during its 2003-2007 hiatus)
- House of Mouse
- Il Était Une Fois... (debuted in 1978)
- Oggy and the Cockroaches: debuted in 1998, Season 2 aired in 2000, Season 3 aired in 2008.
- Purno de Purno: Was rebooted in 2006.
- The Simpsons (started in 1989)
- SpongeBob SquarePants (debuted in 1999, but didn't muster up even a shadow of the overwhelming world-fame it was about to gain in the 2000s)
- Arthur, It's Only Rock 'n' Roll
- Arthur's New Friend
- Arthur's Perfect Christmas
- Bamimation
- BIONICLE
- Candy Land: The Great Lollipop Adventure
- Captain Sturdy
- China, IL. The original shorts were released in 2008.
- Christmas Carol: The Movie
- Christmas is Here Again
- Constant Payne
- Delgo
- Felix the Cat
- The Fight for the FoxBox
- Flushed Away
- G.I. Joe
- G.I. Joe: Sigma 6 (2005)
- G.I. Joe: Resolute (2009)
- Hair High
- Headcases
- Here Comes Peter Cottontail: The Movie
- The Invisible Man
- Jojo: The Violet Mystery
- Korgoth of Barbaria
- The Legend of Frosty the Snowman
- Metajets
- Monster Allergy. Adaptation of the comic book series.
- My Little Pony
- Nicktoons Film Festival
- Pop Secret
- Scooby-Doo
- What's New, Scooby-Doo?
- Shaggy & Scooby-Doo Get A Clue!
- Scooby-Doo Direct-to-Video Film Series:
- Scooby-Doo and the Alien Invaders (2000)
- Scooby-Doo and the Cyber Chase (2001)
- Scooby-Doo! and the Legend of the Vampire (2003)
- Scooby-Doo! and the Monster of Mexico (2003)
- Scooby-Doo! and the Loch Ness Monster (2004)
- Aloha, Scooby-Doo! (2005)
- Scooby-Doo in Where’s My Mummy? (2005)
- Scooby Doo! Pirates Ahoy! (2006)
- Chill Out, Scooby-Doo! (2007)
- Scooby-Doo! and the Goblin King (2008)
- Scooby-Doo! and the Samurai Sword (2009)
- Spookley the Square Pumpkin
- Tom and Jerry
- Toonimals
- Transformers
- 'Twas the Night
- Van Helsing: The London Assignment
