Well, an attorney might suggest they not use words like robbery. Robbery is defined, as a legal term. This is just simple theft. Robbery requires force, implied force, or fear.

It's going to suck if this guy gets sued for libel.

Theft is often a misdemeanor where robbery is often a felony. They are pretty different things, legally speaking.

IIRC it's the same as doing it anywhere else. You retain someone to represent you and they do so. In some states, you must appear on your own - but not in MA, I don't think, and you can still have an attorney advising you even if they can't appear with you.

Certainly in California you must represent yourself. But you can consult an attorney. They will point out the counter-arguments that you need to be prepared for, which is a very valuable service.

Any idea of the ball park costs for such consultation?

I'm looking at taking two parties to small claims court, over ~$1,000 USD, and wonder if it's worth the fees to seek legal guidance.

Nope, not worth it. Cheap lawyers are ~$250/hour.

Seems unlikely, at least in Australia it's common for lawyers to be $400+/h; even for a relatively simple case I was looking to have a lawyer review an employment contract.