Blue's Clues/Adventure Time (2010)

Version 1

 * Slippery Soap as Finn
 * Joe as Jake (Joe and Jake both have their names starting with a letter "J" and ending with a letter "E")
 * Charizard (from Pokémon) as Ice King
 * Pail as Lady Rainicorn (Pail and Lady Rainicorn botrh have "A" in the middle)
 * Gloria Estefan as Princess Bubblegum
 * Captain Hook (from Peter Pan) as Lumpy Space Princess
 * Tickety Tock as Marceline the Vampire Queen

Version 2

 * Steve as Finn
 * Mailbox as Jake
 * Scamp (from Lady and the Tramp 2) as Ice King
 * Toni Braxton as Lady Rainicorn
 * Mrs. Pepper as Princess Bubblegum
 * Tamera Mowry as Lumpy Space Princess
 * Tickety Tock as Marceline the Vampire Queen