you have not provided any kind of hint as to even what the theme looks like
but usually there's a link to the theme somewhere, otherwise it's stolen or by the user. go ahead and ask if the ask box is open.
You shouldn't steal Tumblr themes! :PP
It looks as if xstillfly is currently using a customized theme. This means that somebody personally created the theme, and it isn't available in the Tumblr theme garden. Although this theme isn't publicly available, you might try contacting the user and asking if they'd be willing to share the code for their theme so you may using it.
Making a tumblr theme is not that easy. But there are sites that offers good quality themes, with affordable prices.
It's easy to customize your blog's theme on the Tumblr app for Android. Just go to your blog page and click Edit at the top. From there you can change your theme and customize its colors and fonts
Google "perry the platypus tumblr theme".
Learn HTML.
The best thing to do is to message the user on Tumblr and ask where they found their theme or who made it.
The theme used on that site is called Optica
Search around the theme garden. There should be one there. If not look around the web. There are lots of sites dedicated to tumblr themes.
Superfr3ak likely sourced his Tumblr theme from a third-party website that offers customizable themes for Tumblr users, such as ThemeForest or Tumblr's own theme garden. Many users also create their own themes or modify existing ones to suit their personal style. If you're looking for a specific theme, checking Superfr3ak's blog for theme credit or links in the footer might provide more information.
yes
things change. there are probably plugins for the old theme