Oh gosh I have a Guzma sim myself! I would like more stuff but as a start, here's a picture of him if you need any links to anything used on him. Actually the only thing I can think of off the top of my head (which I swear wasn't meant to be a pun when I started typing this) that's custom is his glasses, since they have to be so high on his head.
It...isn't exact yeah. But he's way closer than my Lusamine can get (my current house is all bosses). Curse her wind sail hairdo!
For Guzma, I had to use the University Life expansion so he could have his spray paint set. I put the spider wall decoration and the ant farm in his room, and I used a lot of this set to decorate as well
http://www.thesimsresource.com/arti...appy/id/951236/
Having wine bottles and a treasure chest around are also good notations to have!
Plumeria I would have no idea but you may want to look up various types of punk makeup. I don't know what the name for it is but I think it's close to
https://en.wikipedia.org/wiki/Ganguro#Yamanba despite her being apparently naturally tan.