If you are coming from Retrobat, there is a community script that can automate the process. It's also possible to do batch gamelist editing with ARRM or RobG66's Gamelist Manager. Just follow the instructions from its Getting Started guide, installing the script to a folder in Batocera's network share and running the commands via SSH. If you've already copied your ROMs over to Batocera and would like to cut down in a simpler manner, you can use tools that can be run inside of Batocera such as andrebrait's 1g1r-romset-generator instead. Then, a tool such as Voljega's BestArcade can be used to create a curated set. For arcade games specifically, it's recommended to first read the dedicated arcade guide first. If you've got a large set of ROMs and would like to cut down on duplicates/languages you don't need, you can use external tools such as Romulus alongside unexpectedpanda's retool utility. Write themes for batocera-emulationstation.Redirect upgrades from any board to my own builds.Latency reduction and optimizing performance.
Raspberry Pi: Add power buttons/switches.