There are a few sketchy outfits that daphne wears to bed and two villains are also kinda sketchy but doesn't show anything just a little cleavage

Some flirtatious comments with innuendo are heard throughout the show.

In one episode, at an art show there is a piece of art with painted women's underwear items on it. This piece is only shown briefly.

Lots of flirting between teens.

In S1 EP3 Fred's dad who is the mayor of Crystal Cove says to Fred he's going to tell him about where he places Peking meters outside before Velma replies "I know another place he needs to stick a parking meter at" implying she wants him to shut up and stick one up his ass.

Multiple decaying corpses are seen.

One use of "darn".

Some uses of "freaking" and "hell"

There's a scene where a girl takes her 'face' off like a mask under her mask is a creepy zombie face

The appearance of most of the monsters/villains are scary.

This series is much darker than most Scooby Doo interpretations, with scenes where characters are threatened with death or face both real and supernatural threats much more intense than the usual "bad guy in a mask" routine from the classic series.