Ad-Hoc Multiplayer on Retro Handhelds - No Internet Required!
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There's a new feature within JELOS custom firmware that will allow you to play local multiplayer between Linux-based retro handhelds running the same OS -- n...

In the video Russ uses JELOS on a Powkiddy X55, RG353V, RG552, and the Ayaneo Air Pro to show how to setup net play and provides a few examples. He states that he wasn’t able to get Pokemon battles/trading working. GB games work when a save game isn’t required.