Axe and Crooks are Bones and Lucky if things went Wrong. And things did go Wrong. Something happened that caused humans in their world to wall up the monster sections of the city, trapping the monsters in there. With limited resources, Axe turned his business from selling magic on the downlow to selling food from the other side of the wall. Since he could teleport, he was one of the few monsters who could leave. Crooks helped him smuggle food in to help the monsters in their section of the city (screw the legality of it--when the humans are not following the law and monsters are dying, there is a Right and a Wrong thing to do and it doesn’t matter if it’s legal).
It was all going fine...until it wasn’t. Until there was demand for other things. Until they were bringing back more than just food. Until other things became food. They don’t talk about it. Axe got hurt and Crooks got hurt and they were both just trying to do the right thing. And it didn’t work.
Eventually, times changed. New laws were made. Monsters gained rights and the walls came down. Now Axe and Crooks are trying to find a way to make it in this new world.
Axe is much more cynical than Bones (or Sansy for that matter). He doesn't trust anyone easily. He has a lot of memory problems and can't really hold down a job. He mostly stays home now. He hates feeling useless, but doesn't know what he can do.
Crooks is trying very hard to hold onto his good nature and optimistic outlook on life, even after all he's been through. He's given up on his old dream of being a lawyer. It's hard to him to stay on his feet for long hours. He uses a cane to get around. He does have a job working at the hall of records. It's mostly a desk job, so he can sit.
Some old acquaintances of theirs try to pull them back into smuggling again. Some of them still can't forgive what humans did to ‘em so they try to get them to smuggle more illegal things. The boys want nothing to do with it, but it could complicate things...
These two are the only ones who haven’t got different nicknames. G and Aster are three people in two bodies. Dr. Gaster was working on slightly illegal experiments for Don Asgore, trying to find a way to bring the don’s lost children back to him. The good doctor’s own children, Sans and Papyrus, were helping him when an experiment went terribly, terribly wrong. Suddenly there were two skeletons instead of three. Each of them had the whole consciousness of one of the sons and half of their father’s consciousness as well. Both boys have sworn off any further science work and any connections with the mob, going into hiding so that Asgore doesn’t find them.
Gis now your standard hard-boiled 1940s detective type. He’s done things he’s not proud of, but that life is behind him now and he’s not gonna let some dame pull him back in. Even if it’s his old work that’s causing all these issues. He don’t do that kinda thing any more, kitten. Not even for someone like you.
Aster is...a mess. He remembers a lot more of the things Gaster did for Asgore than G does and it horrifies him. (The doctor kept a lot of it from his sons...) He’s found a quiet office job, just filling out and filing paperwork. Mindless work, with no connection to the mafia. He just wants to be left in peace.