I made this case for my friend who had a Cruzer Blade pen drive with a broken case and wanted to fix it, but I pushed it further by adding his name initials, capacity and an awesome glowing orange Pikachu logo on the back.
Behind the glowing Pikachu is a 0402 SMD led connected to one of the data pins on the end of the PCB (It was a tough time soldering that). The animation changes based on data transfer activity.
See it in action - https://twitter.com/vishalroygeek/status/1589978093036658693
The author remixed this model.