This is the best answer. I think a good gauge would be the GTA3 re3 project. On the 3DS, GTA3 runs slow, and it's a PS2 game. Even if LittleBigPlanet's source were available, I'd expect a PS3 game to run even slower.You could definitely write a similar game or an outright clone of LBP for 3DS, similar to the PSP installment. Otherwise, the 3DS is far too limited in power to fully replicate the console experience of the LittleBig Planet series.
Even the Playstation Vita struggled to replicate the full functionality of the console installments, as LBP vita seems to have been derived from LBP2's engine, albeit with significant downgrades.
Yes - exactly.This is the best answer. I think a good gauge would be the GTA3 re3 project. On the 3DS, GTA3 runs slow, and it's a PS2 game. Even if LittleBigPlanet's source were available, I'd expect a PS3 game to run even slower.
It's an interesting idea, but it would have to be someone's passion project. The demand is just too low for a 3DS port of LBP, which means you'd have a hard time finding a dev to undertake the project.

The psp one is good enough.If they tried it would suck. The 3ds is just too slow.
And then, stopped working on it. It wasn't a port, it was a recreation. The 3DS was never capable to running Mario Odyssey. Plus, there's no easy way to "port it" due to the lack of source-code.someone made a somewhat working port of mario odyssey, lbp is possible but it wouldnt be as powerful as it is. Anything is possible!