Adventure Time's backstory is super serious. It takes place in a post-apocalyptic world that was caused by the Great Mushroom War. The picture above shows the damage caused to Earth from it. Throughout the series, there are many references to the nuclear war.
Finn is one of the main characters, and he has better hair than you.
Jake the Dog is the other main character. He has stretchy powers that allows him to shrink, grow, look like other people
Jake's in a serious relationship with a rainbow unicorn whose name is Lady Rainicorn. She only speaks Korean.
Marceline, the Vampire Queen, doesn't suck blood to feed.
She sucks the color red out of objects.
Lumpy Space Princess (LSP) should be someone every person should aspire to be.
There's an entire kingdom made of candy whose subjects are also made of sweets.
Fun fact: Mr. Cupcake is chocolate underneath.
Princess Bubblegum is Candy Kingdom's ruler. She sometimes eats her subjects.
And in one episode, her subjects eat her.
Finn's love for Bubblegum is cute.
Adventure Time has some of the best fan art.
Adventure Time teaches good life lessons for kids.