Any console, any game. Everyone runs the game on their own device, in lockstep — only controller input crosses the network, so your own buttons are as immediate as they are offline.
Read the code out, or send the link — the link already knows the console and the game.
Pressing Start opens the emulator and the room. Nobody's game begins until every player's console has finished loading — that is the start barrier, and it is what makes frame 0 the same moment for everybody.
Five characters, no I, O, 0 or 1. If you were sent a link, paste it here and the console and game fill themselves in.
Enter the code, then choose the console the host is on.