the blond bully on the bus

Because that's how bullies are in the real world. I was hoping Chucky would give that brat some comeuppance before he left the school.

https://www.fanfiction.net/u/5423577/Bobbydrake2000

yep bullies in the real orld do this all the time, they target 'weaker' people or people they do not know. There often does not have to be a reason.

Get lost, microchip!

Really, it's a contrivance of the writer who is trying to make us feel as sorry as possible for Andy.

While I'm not saying that similar bullying doesn't occur in real life, in real life bullying is rarely acted first then spoken later. The absence of words from the bully, who has just met his victim remember, makes him kind of unrealistic.

If you're looking for a general answer as to why kids bully, it's entirely a status thing. They bully because they're afraid of being bullied, which means they have probably been bullied themselves in the past and that triggered the behaviour.

Kids will generally not start bullying as a physical thing, since physical conflict is exactly what they're worried about.

"I don't reckon I got no reason to kill nobody."

Donald Trump as a child.

I think he was the son of Chucky. Andy should have taken care of him.