I've been trying to figure this out for a while now, It is listed as supporting it on Co-optimus, while the other 2 games don't have it. I want to be able to play it on 2 seperate PS3 systems on 2 seperate screens. I've set up link play with both the Crossover cable and just though LAN on the router but cannot figure out how to join the other PS3 console's lobby. Any help would be appriciated.
Thanks!
I've never personally heard of anyone being able to do LAN play in LittleBigPlanet 1, 2, or 3. Though, I could be wrong.
What I do know is that the game's normal online servers work on a P2P basis - that is, once all the players initially connect, the PS3 consoles talk directly to each other rather than to the game's servers. TL;DR is you'd need the gameservers to be online to make the initial connection.
The other option is to get your hands on a private server and set the consoles up with CFW to connect to that server, but that's probably a massive headache for this scenario.