[This one accessorizes with skulls, let's face it, she's weird.]

You mean Slugma? Yeah...and that evolves into something with a shell, so it turns into a snail? I don't think that's entirely how that works. There's also Shellos, which might be some kind of sea slug, at least that stays consistent as it evolves. It makes me wonder if Bloober will evolve into anything eventually, nobody seems to have had much luck with figuring out their moves or training them.