My brother got his first job and then ghosted them. What happens next?

Hey guys, I’m just curious about this. My 18-year-old brother got hired at a restaurant after doing interviews for a while. He got the job, showed up to the first two days of work (first was filling out paperwork, second was the first day of training), then stopped coming and ghosted them. It’s been about five days now. I was just wondering if this will have an impact on his future employment and everything, especially since there was no emergency or any valid excuse for him to just blow off a perfectly good job like that. I’ve never known anyone who’s done something like this so that’s why I was wondering. Sorry for the weird question and thanks!