While most Digimon fans first encountered the series during childhood, the show features some surprisingly mature themes. A few reasons why Digimon wasn't for kids include the rampant string of death plaguing both Digimon and human characters, plotlines involving organ harvesting rings, and fish monsters wanting to mate with an 11-year-old girl.
That's simply scratching the surface - there are many more questionable moments in the series. For this reason, it's an anime worth a rewatch as an adult, though kids today should view it with caution.
Divermon Wants To Mate With Kari
Divermon (known as Scubamon in the dub) is a deep-sea monster who wants something decidedly not kid-friendly from Kari. A squadron of Divermon attempt to kidnap her, claiming they want her to bear their children so they can increase their numbers and overthrow their leader.
The creatures also talk about how pure Kari is, which is shockingly lascivious given the context. The dub eliminated the mating plotline for understandable reasons, but even without this, Kari still gets kidnapped by freaky fish monsters.
Jeri's Horrific Nightmare
Jeri Katou's character arc incorporates several painful themes routinely cropping up in Digimon. First, her mother dies, which traumatizes her and makes it impossible to connect with her new stepmother. Later, her partner Digimon dies.
The resulting trauma from these compounded losses makes Jeri a prime target for the D-Reaper. He kidnaps and tries to brainwash her into believing humans deserve to die.
This leads to a shockingly occult nightmare wherein Jeri runs scared through the halls of a hospital, while shadowy figures pursue her and advocate the D-Reaper's macabre worldview.
Yukio Oikawa's Story Is Way Too Depressing
Yukio Oikawa's story is not particularly kid-friendly. As a child, he and his best friend Hiroki Hida grew obsessed with the Digital World and promised each other to one day make it there.
The two pals grow apart when Hiroki's father decides Yukio is a bad influence, but they still care about each other and hold the promise in their hearts. As an adult, Hiroki becomes a police officer and dies in the line of duty, compelling Yukio to venture to the Digital World.
Yukio's desperation - along with his possession by a Digimon vampire - leads him to commit atrocious acts. He creates Digimon who kidnap children, and manipulates Ken into becoming the evil Digimon emperor. When he eventually dies, the Digital World is within reach, but he never gets to visit it.
The Dark Ocean Is A Seriously Messed Up Concept
If you're creeped out by the mist, is it because you saw the Dark Ocean arc when you were little? The Dark Ocean, a bizarre world existing between the real world and the Digital World, has the power to twist and magnify negative thoughts, as well as create new realities.
The episode heavily features the Dark Ocean with muted colors and little speech, adding to the eerie ambiance. The dub lightens the load a bit by peppering the silence with an internal monologue, but it's still visually and conceptually unsettling.
The Dark Ocean is responsible for corrupting Ken's Digivice, which ultimately caused him to become the Digimon Emperor. Kari also becomes involved and overwhelmed by negative emotions. Furthermore, a group of monsters appear and state their intention to procreate with her. Of course, this isn't included in the English dub, but this doesn't mean it didn't happen.