Mild
89 of 220 found this mild
Moderate
69 of 142 found this moderate
Mild fantasy violence is usually used as self defence against terrifying beasts and certain characters.
Even most of the violence present in this cartoon is mild and it's mostly towards fantasy characters (think of punches, kicks, swordfights... and the consequent bruises and scratches), in some cases this can be a little more graphic and even include red blood and gore, but that's rare.
The series mainly takes place in a post-apocalyptic world. The opening has a dismembered arm inside a hollow tree. Very fast, can't be seen without pausing. Fans think the arm belongs to Shoko.
In "The Enchiridion", Finn kills a monster shaped as a heart, red blood sprouts all over. Very brief and the blood might have not stained anything.
Some decapitation of small parts (noses and hands), or limb removal, mauling (i.e. arms chopped off) throughout the series, but no blood, only flesh wounds.
Several fight scenes are played out for humor. For example, there is a character named Ash, who everyone hates, since he is a douche. Marceline kicks his crotch and Finn starts beating him up with her. Finally Jake stomps him with his giant foot. Even the Ice King (Simon Petrikov) in one episode punches him with no good reason.
In "Who Would Win", Finn and Jake start beating up each other, because they are proving themselves who is more resilient. Both of them have lots of nasty looking bruises and cuts.
In "Freak City", the Magic Man turns a bird inside out making it show the birds guts, flesh and everything else.
Some scatological humor, including spitting and visible green vomit in some episodes, when the characters are disgusted. For example, Jake explicitly vomits into a jacuzzi in the episode "Jake the Dog". Farting is more frequent.
In "A Glitch is a Glitch", a pale skinned, creepy looking woman in a TV eats her own hair. She gags a lot, and is all the time ready to vomit. Jake and Finn are absolutely disgusted.
Mild
82 of 160 found this mild
None
87 of 137 found this to have none
Princess Bubblegum pours herself a glass of what appears to be alcohol in one episode. A character is named Root Beer Guy and his head has the shape of a beer mug. PERO.
In one episode a character is seen smoking a bubble pipe.
Marceline is seen wearing an anti-smoking shirt in one episode.
Moderate
58 of 127 found this moderate
Emotionally intense scenes when the show refers to character's backstories.
In one episode, Magic Man opens a door by constantly cracking and breaking his wrist.
Some characters have scary faces or bodies. Some are just disturbing in general.
Mild/Moderate in a lot of episodes.
Mild/Moderate for neurodivergent viewers.
Lemongrab eats Lemongrab 2 once and is next time seen with a chunk of his face bit off and he has no torso. Lemongrab 2 is eaten again and is seen again inside the stomach of Fat Lemongrab with a larger chunk of his face bit off.
Any episode involving The Lich can be intense. Also, speaking of said character, he has an extremely frightening and nightmarish appearance that is potentially terrifying for viewers, especially younger ones, and talks in a similarly creepy demonic-sounding voice.
It should be noted that on non-US airings of this show on TV, the episodes have been very heavily censored and cut. For example, in UK and Australian airings, almost every episode has had several edits made to it. Sometimes entire segments have been cut, or even banned (but it's very rare).