PowerA continues to pump out special versions of their Switch controllers, and now they're offering some new Mario variants. Above you can see a "Mario Pop" version of their Enhanced Wireless controller, as well as a "Vintage Star" version of their Enhanced Wired controller. You can grab those here and here.
Along with that, the company is also selling a Mario-themed version of their Wireless GameCube-style controller. You can find that one here.