@Shivermetimbers13
Yes, he is communicating that he is badly behaved enough to be excluded, thereby disrupting the education of his peers.
I agree
By SEN I assume you mean ADHD, autism, or some other combination of initials. As I said, the OP hasn't mentioned any of these.
Not really i mean special educational needs, its a very broad category, he doesn't need a diagnoses and this could be to do with external factors for example a child being a carer or having a parent in prison etc. A child may have SEN temporarily due tot he above or perhaps a health condition which they can recover from. Like cancer.
There are very many children who are badly behaved, with absolutely no special needs.
To be 13 and getting permanently excluded is so extreme that i would disagree this is merely a bit of bad behaviour. This lad has serious issues. he may have SEMH, ADHD or some other issues that need to be looked at. His behaviour sounds well outside a normal range.
Or do you think that all badly behaved children must have special needs?
To this extent yes, but see above for the definition of special needs. I think yours is very narrow.
The only positive I can see here is that, at 13, he still has time to turn his behaviour around.
Maybe, maybe not. I suggest he clearly needs help and a plan.