I don't use Pidgin at all but attempts to uninstall it have failed. It will say "unable to to uninstall %APPNAME%."
New: Audacious (June 1, 2023), Platform 25.0 (Apr 07, 2023)
New Apr 14: macOS Portable Drive Support
450+ real apps (49GB), 1.1 billion downloads, Please donate.
...with some apps.
The alternative is simply to delete the PidginPortable folder, that is essentially what the menu is doing.
“There is a computer disease that anybody who works with computers knows about. It's a very serious disease and it interferes completely with the work. The trouble with computers is that you 'play' with them!”Richard Feynman
I had tried that and it hadn't worked. The darn thing could still open and run and everything, so I figured there had to be another folder of it somewhere that I just hadn't found yet. Sure enough I found another folder within a folder and deleting that did the trick and even removed the icon from the Portable Apps menu, just like you said.