Thanks !
I've been able to run pacman battleroyale on batocera (namco 2x6 system). For now, I think it's 1 player only (as batocera doesn't have the latest version of play!).
I've been chasing the perfect pacman battleroyale version for a while: I like playing with 9 rounds and long timeout, so:
1) in rpcs3, you have a version in which you can access the settings menu, but there's a awful bigborder in the game
2) on switch emulator: (namco museum+): the display is ok BUT the dev didn't put a settings menu (congrats dev ! good job, really...): so I'm stuck with 5 rounds. I've tried to use cheat engine to change the nb of rounds + timeout. It's probably too difficult for me. My ultimate goal was to create a mod (cheat) for yuzu/ryujinx... with 9 rounds and long timeout (if anyone is interested in this challenge, please do it !)
3) this one may be the best option. It's for a cocktail table, but if I can manage the 4 players, that could be it.