Everyone/The Muppets, Sesame Street, Fraggle Rock, etc.

Cast

 * The Cat in the Hat (from The Wubbulous World of Dr. Seuss) as Kermit the Frog
 * Sarah Small-Hall (from The Wubbulous World of Dr. Seuss) as Miss Piggy
 * Papa Bear (from The Berenstain Bears) as Fozzie Bear
 * Kwazii (from The Octonauts) as Gonzo
 * Walden (from Wow! Wow! Wubbzy!) as Scooter
 * Scooby-Doo (from Scooby-Doo) as Rowlf the Dog
 * Elmo (from Sesame Street) as Walter
 * Chunk Squarey (from Rolie Polie Olie) as Dr. Teeth
 * Prince James (from Sofia the First) as Floyd Pepper
 * Princess Amber (from Sofia the First) as Janice
 * Hoots the Owl (from Sesame Street) as Zoot
 * Cookie Monster (from Sesame Street) as Animal
 * Bearning Love (from Beanie Babies) as Lips
 * Rudy the Mouse (from Maggie and the Ferocious Beast) as Rizzo the Rat
 * Olie Polie (from Rolie Polie Olie) as Dr. Bunsen Honeydew
 * Billy Bevel (from Rolie Polie Olie) as Beaker
 * Strong Bad (from Homestar Runner) as Sam the Eagle
 * Tunip (from The Octonauts) as The Swedish Chef
 * Dashi (from The Octonauts) as Camilla the Chicken
 * Sharky and Bones (from Jake and the Never Land Pirates) as Statler and Waldorf
 * Bubs (from Homestar Runner) as Dr. Julius Strangepork
 * Homestar Runner (from Homestar Runner) as Link Hogthrob
 * Max (from Max and Ruby) as Bean Bunny
 * Seven (from Little Charmers) as Robin the Frog
 * Toopy (from Toopy and Binoo) as Pepe the King Prawn
 * Patrick Star (from SpongeBob SquarePants) as Beauregard
 * Phineas Flynn (from Phineas and Ferb) as Johnny Fiama
 * Ferb Fletcher (from Phineas and Ferb) as Sal Minella
 * Shaggy (from Scooby-Doo) as Clifford
 * The Jellybean Team (from Maggie and the Ferocious Beast) as Penguins
 * Twilight Sparkle, Pinkie Pie, Applejack, Rainbow Dash, Rarity and Fluttershy (from My Little Pony: Friendship is Magic) as Chickens
 * Kermit the Frog (from The Muppets) as Big Bird
 * Sheldon J. Plankton (from SpongeBob SquarePants) as Oscar the Grouch
 * Gumball (from The Amazing World of Gumball) as Ernie
 * Mr. Robinson (from The Amazing World of Gumball) as Bert
 * Big Mouth (from Peg + Cat) as Cookie Monster
 * Huckleberry Hound (from Yogi Bear) as Grover
 * Snagglepuss (from Yogi Bear) as Count von Count
 * Benny the Bull (from Dora the Explorer) as Herry Monster
 * The Ferocious Beast (from Maggie and the Ferocious Beast) as Snuffy
 * Pluto (from Mickey Mouse Clubhouse) as Barkley
 * Boots (from Dora the Explorer) as Elmo
 * Doc McStuffins (from Doc McStuffins) as Zoe
 * Polly Pi (from Rolie Polie Olie) as Rosita
 * Fozzie Bear (from The Muppets) as Telly Monster
 * Bear (from Bear in the Big Blue House) as Baby Bear
 * Peg (from Peg + Cat) as Prairie Dawn
 * Jake (from Jake and the Never Land Pirates) as Roosevelt Franklin
 * Baileywick (from Sofia the First) as Sherlock Hemlock
 * Lisa Simpson (from The Simpsons) as Betty Lou
 * Squidward Tentacles (from SpongeBob SquarePants) as Mr. Johnson
 * Flik, Atta, Heimlich and Dot (from A Bug's Life) as Twiddlebugs
 * Snail (from Franklin) as Slimey the Worm
 * Princess Luna (from My Little Pony: Friendship is Magic) as Grundgetta
 * Yertle the Turtle (from The Wubbulous World of Dr. Seuss) as Lefty the Salesman
 * Robin the Frog (from The Muppets) as Little Bird
 * Martian Mickey and Pluto from Pluto (from Mickey Mouse Clubhouse) as The Martians
 * Ludwig von Drake (from Mickey Mouse Clubhouse) as Mahna Mahna
 * Nicholas Biscuit (from Pinky Dinky Doo) as The Amazing Mumford
 * Zowie Polie (from Rolie Polie Olie) as Baby Natasha
 * Icky No-No (from Muppet Time) as Guy Smiley
 * Max (from Dragon Tales) as Farley
 * Diego (from Go, Diego, Go!) as Gobo Fraggle
 * Sofia (from Sofia the First) as Mokey Fraggle
 * Caillou (from Caillou) as Wembley Fraggle
 * Ramone (from Peg + Cat) as Boober Fraggle
 * Izzy (from Jake and the Never Land Pirates) as Red Fraggle
 * Grover (from Sesame Street) as Uncle Traveling Matt
 * Dino (from The Flintstones) as Sprocket
 * Miss Nettle (from Sofia the First) as Mean Mama
 * Big Red Chicken (from Dora the Explorer) as Doglion
 * Big Bird (from Sesame Street) as Sweetums
 * Golias, Nessa and Bongo (from My Big Big Friend) as The Mutations
 * Willie the Giant (from Mickey Mouse Clubhouse) as Thig
 * Magellan (from Eureeka's Castle) as Thog
 * Clifford (from Clifford the Big Red Dog) as Timmy Monster
 * Blue (from Blue's Clues) as Alice Snuffleupagus
 * Strong Mad (from Homestar Runner) as Bruno the Trashman
 * Max the Grinch's Dog (from The Wubbulous World of Dr. Seuss) as Muppy
 * Muno (from Yo Gabba Gabba!) as Big V
 * Mr. Krabs (from SpongeBob SquarePants) as Beautiful Day Monster
 * Grumpy Old Troll (from Dora the Explorer) as Gorgon Heap
 * Sand Serpent (from Jake and the Never Land Pirates) as Sammy the Snake
 * Hilda Hippo (from The Busy World of Richard Scarry) as Aretha
 * Grundgetta (from Sesame Street) as Taminella Grinderfall
 * Dr. Bunsen Honeydew (from The Muppets) as Dr. Nobel Price
 * Inky the Octopus (from Beanie Babies) as Octopus
 * Emily (from Little Bear) as Deena
 * Meg Griffin (from Family Guy) as Pearl
 * Joey (from Dr. Seuss) as Kermit the Forg
 * Do Re Mi Monster (from Muppet Time) as Bruce Monster
 * Spike (from Tom and Jerry) as Harvey Monster
 * Kelly Crenshaw (from Handy Manny) as Bertha
 * Herry Monster (from Sesame Street) as Big Mean Carl
 * Oswald (from Oswald) as Pokey
 * Frosty the Snowman (from Frosty the Snowman) as Snowman
 * Benson (from Regular Show) as Grump
 * Sulley (from Monsters, Inc.) as Behemoth
 * as Lindy