Fun Song Factory/Codename: Kids Next Door

Cast

 * Ten Cents (from TUGS) as Numbuh 1
 * Thomas (from Thomas & Friends) as Numbuh 2
 * Rosie (from Thomas & Friends) as Numbuh 3
 * Percy (from Thomas & Friends) as Numbuh 4
 * Emily (from Thomas & Friends) as Numbuh 5
 * Merida (from Brave) as Numbuh 86
 * Lillie Lightship (from TUGS) as Numbuh 362
 * Gordon (from Thomas & Friends) as Numbuh 60
 * Princess Anna (from Frozen) as Numbuh 10
 * Sierra (from Total Drama) as Lizzie Divine
 * Wendy Testaburger (from South Park) as Numbuh 83
 * Stan Marsh (from South Park) as Numbuh 84
 * Doctor N. Gin (from Crash Bandicoot) as Heinrich Von Marzipan
 * Queen Elsa (from Frozen) as Henrietta Von Marzipan
 * Helga Sinclair (from Atlantis: The Lost Empire) as Cree Lincoln
 * Angelica Pickles (from Rugrats) as Mushi Sanban
 * Butters Stotch (from South Park) as King Sandy
 * Nanette Manoir (from Angela Anaconda) as Valerie
 * Sonic (from Sonic) as Sidney
 * Princess Sally Acorn (from Sonic) as Jessica
 * Sunshine (from TUGS) as Trevor
 * Hercules (from TUGS) as Numbuh 1-Love
 * Noddy, Tessie Bear and Mr. Plod (from Noddy) as The English KND
 * Captain James Hook (from Peter Pan) as Stickybeard
 * Ursula (from The Little Mermaid) as Grandma Stuffum
 * Joker (from Batman) as Knightbrace
 * Mrs. Edna Krabappel (from The Simpsons) as Mrs. Thompson
 * Yzma (from The Emperor's New Groove) as Crazy Old Cat Lady
 * Doctor Neo Cortex (from Crash Bandicoot) as Mr. Boss
 * The Condiment King (from Batman) as The Toiletnator
 * Count Dracula (from Hotel Transylvania) as Count Spankulot
 * Mr. Wint and Mr. Kidd (from Diamonds Are Forever) as Mr. Wink and Mr. Fibb
 * Alejandro Burromuetro (from Total Drama) as Mr. Fizz
 * Dr. Facilier (from The Princess and The Frog) as Cuppa Joe
 * Doctor Heinz Doofenshirtz (from Phineas and Ferb) as Professor XXXL
 * Doctor Robotnik (from Adventures Of Sonic The Hedgehog) as Common Cold
 * Dawn Bellwether (from Zootopia) as Nurse Claiborne
 * Jessie and James (from Pokemon) as Mega Mom and Destructo Dad
 * Jafar (from Aladdin) as Al Sugarh
 * Davy Jones (from Pirates Of The Caribbean) as Black John Licorice
 * Miss Agatha Trunchbull (from Matilda) as Soccer Mom
 * Shredder (from Teenage Mutant Ninja Turtles) as Cheese Shogun Roquefort
 * King Candy/Turbo (from Wreck-It Ralph) as Rupert Puttkin/The Great Puttinski
 * The Queen Of Hearts (from Alice In Wonderland) as Laura Limpin/The Big Badolescent
 * Boss Baby/Theodore Templeton (from Boss Baby) as Mr. B
 * Governor John Ratcliffe (from Pocahontas) as Chester
 * Charles Muntz (from Up) as Mr. Washer
 * Dolores Umbridge (from Harry Potter) as Madam Margaret
 * Jacques and Josee (from Total Drama) as The ITFBTM
 * Jessica Lovejoy, Kearney, Dolph and Jimbo Jones (from The Simpsons) and Meg Griffin (from Family Guy) as The DCFDTL
 * Hades (from Hercules) as Father
 * The Horned King (from The Black Cauldron) as Grandfather
 * Warp Darkmatter(from Buzz Lightyear of Star Command) as Chad Dickson

In The Grim Adventures of KND:

 * Zim(from Invader Zim) as Billy (Both have the same voice actor)
 * Aku Aku (from Crash Bandicoot) as Grim
 * Sarah(from Ed, Edd n Eddy) as Mandy
 * Jonny(from Ed, Edd n Eddy) as Irwin
 * Owen(from Total Drama) as Harold
 * Jessica Lovejoy(from The Simpsons),Meg Griffin(from Family Guy),Kearney,Dolph,& Jimbo(from The Simpsons) as The DCFDTL
 * Ten Cents(from TUGS) as Numbuh 1
 * Thomas(from Thomas & Friends) as Numbuh 2
 * Rosie(from Thomas & Friends) as Numbuh 3
 * Percy(from Thomas & Friends)) as Numbuh 4
 * Emily(from Thomas & Friends) as Numbuh 5
 * May Kanker(from Ed, Edd n Eddy) as Numbuh 14
 * Harold(from Total Drama) as Numbuh 74.239
 * Lillie Lightship(from TUGS) as Numbuh 362
 * Gordon(from Thomas & Friends) as Numbuh 60
 * The Rock Titan(from Hercules[1997]) as The Delightful Reaper