How to remove a .LNK virus from a Pen Drive?

Unhide everything, copy all important files over, format it (best on any other OS than Windows...), plug it back in (in Windows lol)

As people has said, unhide everything (usually they hide the files as "operating system files") and copy your files from the hidden folder. Delete the shortcut and most likely the obscure file that looks like a bunch of random symbols. DO NOT RUN THE SHORTCUT IN ANY CIRCUMSTANCES.