In an episode, a girl is wearing a maid dress

Mild innuendo. Will most likely go over kids heads.

Male characters are shown bathing in hot springs with nothing but towels covering them. In a couple of scenes, the towels are taken away/fall off in the water, nothing is ever seen though.

Female characters are shown in hot springs and later wearing nothing but towels. In a later scene, they hide a boy by sitting on him.

At one point, a girl (talking about money) says, "That's a lot of booty!" One of the boys says in response, "I beg your pardon?"

Certain monsters features sensual desings, especially in the uncesored version.

Pharaoh showed his testicles in some episodes (uncensored version only).

As a part of the Yu-Gi-Oh! series, it has quite a bit of violence and arguing. No blood is shown when monsters are destroyed, but some characters have scratches and bruises on them from duels.

Characters have their souls taken from their bodies in some arcs, often in a somewhat graphic manner.

In the English Dub, there is no profanity whatsoever. The worse it gets is "heck" or "dang"

English dub has absolutely none.

There's monsters, fighting, and arguing throughout. The monsters and cards might frighten some people, especially in one particular episode in season 2.

Dub: Jaden duels with people called "Shadow Riders", who's appearances might frighten some.