Both exists and you seem to not to really know a lot about it.
I looked back over the threads... saw people posting about it...
Both exists and you seem to not to really know a lot about it.
The message that was mentioned is the message that pops up when trying to put a PAL game into a NTSC system. It was more of a hardware protection thing (prevent PAL game from burning out an NTSC display, since they display/funciton differently).
In addition games with SA1 chip could be used for regional lockout. But that was about it. The most famous of those games would be Super Mario RPG.
The Japanese cartridges and SNES cartridges used hardware regional locking, but that just requires removing a couple of tabs to make the games playable on a US SNES, but won't work the other direction since SNES box carts wont fit into the Super Famicom slots.
If Nintendo is including some kind new 'region' locking on this SNES mini, that seems pretty bizarre. I notice some posters claiming that it does a few pages back though. But it seems like a lot of work to modify something that is pretty irrelevant on modern tvs using HDMI.
Of course further more these videos and other websites discussing the three versions of the system, also point out that Japanese Super Famicom games won't work on a European SNES or vice versa. But also because of that PAL / NTSC protection despite both having the same shaped carts.