Batocera, RetroBat, Recalbox and ROCKNIX offer some emulators both as a
libretro core and standalone. Filed as standalone only, the libretro
layout was dropped: libretro Dolphin had no dolphin-emu/Sys/GC files.
Platforms now name dual-mode emulators and each gets both layouts.
ROCKNIX was declared libretro-only although it packages duckstation,
dolphin, ppsspp and 33 other emulators standalone, and its BIOS list
was read on the next branch under the latest release's version. The
scraper now reads the release tag and lists RetroArch plus every
standalone package.