I guess I'll explain the basics
The collector is a guy with a fancy crystal he can use to make stuff, and he has a buncha robots too. Inkmatas is basically just a Splatoon character with funny green fire, but they're kinda not alive currently. Eggyhead is an egg guy. Enough said. There's a stickman civilisation, a corrupt businessman with a trollface for a head, a potato, a radioactive blob and a robot dog (my ocs), and that's about it
I don't know the really significant details, just ask Dr evil ish about that.