Opening Title Sequence

The Adventure Time opening title sequence features all of the main characters and also some of the minor characters. The theme is sung and played by series creator Pendleton Ward. It has the same lyrics as the animated short but there are some slight variations.

Characters
The following characters can be seen in the opening sequence:
 * Rat
 * Snow Golem
 * Penguins
 * Gunter
 * Ice King
 * Candy People
 * Princess Bubblegum
 * Grape Popsicle Guy
 * Starchy
 * Mr. Cupcake
 * Gingerbread Muto
 * Sugar Cube
 * Lollipop Girl
 * Gumdrop Lass 1
 * Gumdrop Lass 2
 * Chocoberry
 * Mr. Candy Cane
 * Gumball Guardians
 * Raisin
 * Candy Corn Guy
 * Root Beer Guy
 * Lady Rainicorn
 * Marceline
 * Two-Headed Duck
 * Finn
 * Jake
 * BMO
 * Tree Trunks
 * Bats

Fionna and Cake

 * Fionna
 * Cake
 * Ice Queen
 * Prince Gumball
 * Lord Monochromicorn
 * Marshall Lee
 * Tree Trunks (male)
 * Lollipop Guy
 * Penguins
 * Snow Golem
 * Kenneth
 * Rat
 * Root Beer Girl
 * Mrs. Cupcake
 * Mrs. Candy Cane
 * Raisin
 * Chocoberry (male)
 * Starchy (female)

Stakes

 * Finn
 * Jake
 * Cloud Dance
 * Cows
 * Ice King
 * Banana Guards
 * King of Ooo
 * Crunchy
 * Toronto
 * Vampire Essence Creature
 * Marceline
 * Bonnie
 * Peppermint Butler
 * Bats

Islands

 * Princess Bubblegum
 * Marceline
 * Fern
 * Pirates
 * Alva
 * Albert
 * Dolphin People
 * Mechanical Dolphins
 * Guardian
 * Giant Parrot
 * Whipple
 * Susan Strong
 * BMO
 * Jake
 * Finn

Elements

 * Candy Fish
 * Candy Bird
 * Lemon Camel
 * Cinnamon Bun
 * Fire Wolf
 * Patience St. Pim
 * Snow Golem
 * Flame Princess
 * Lumpy Space Princess
 * Fern
 * Betty
 * Ice King
 * Jake
 * Finn

Come Along With Me

 * Shermy
 * Beth

Versions

 * Pilot (2008)
 * Original (2010)
 * Fionna & Cake (2011)
 * A Glitch is a Glitch (2013)
 * Food Chain (2014)
 * Stakes (2015)
 * Bad Jubies (2016)
 * Islands (2017)
 * Elements (2017)
 * Diamonds and Lemons (2018)
 * Come Along With Me (2018)

Others

 * Simpsons Time Couch Gag (2016)