A robot's head gets knocked off in one episode.
In one episode, Principal Barrage loses his leg. He is a cyborg, and the leg was mechanical so once he got it back, he just attached it back on. No gore.
The blue tazelwurms often try to attack people, but no serious harm is ever done.
There was an episode where the main character got into a fight with the three school bullies. Nobody was harmed though as the fight ended abruptly.
The Serpent can be quite violent, and he usually has the intent of harming or even killing others.
