A few kisses in lips through the series, but nothing sexual AT ALL

In one scene, Yzma pulls up her costume of principal Amzy and for a second you can see her underwear, meant to be comical

In one scene, kuzco ask how's the car washing business going, later we see 3 girls in bikini and shorts washing the cars and a man giving them tons of money for their services will go over kids heads but adults will understand perfectly.

In an episode, you can see a closeup of yzma's hairy chin can be gruesome to some

In a Season 2 episode, you see for a second Yzma's dirty foot with a bunion, can be gruesome to some

Characters get hit with objects (statues, pianos, etc) in some episodes, but they are fine in the end and everything is for comedy purposes.

In season 1 finale we can see a snot in kronk's nose as pointed by kuzco just for a couple of seconds, although it isn't a big snot it can be gruesome to some

None

The "llama demon" that are shown in the same episode can scare little kids, but anyone +5 will be OK with them