(adsbygoogle = window.adsbygoogle || []).push({}); i was in a game with a modder and they said they were using serendipity and lts sprx menu and mentioned something about a sprx plugin

You can't use two SPRX menus at the same time. He could be lying. There is no way to know if he is unless you see it on his TV. The most you can do is a Script Loader/Menu and an SPRX Menu. That's the most you can do.