When I try to loader the NTR menu in Animal Crossing: New Leaf it makes the bottom screen go blank and when I press B to close the menu the bottom screen and top screen both display the top screen.
I'm on the latest versions of b9s and Luma as well as running the 2.9 .3dsx version of BootNTR...
It feels like a mix between animal crossing and Zelda to me. Of course I've only played like half the demo so my view doesn't mean to much.
As for the EUR version, there should just be some minor changes to localization.
Your best bet is to call Nintendo, but even if you are under warranty it's still gonna cost money for a repair. You could get a used 3DS as well and get a data transfer.
@Xdqwerty, Osu! Tatakae! Ouendan! is the Japanese version of the game, different settings/characters/songs but otherwise identical mechanics. I played that before I knew about Elite Beat Agents lol. Both fantastic games https://en.wikipedia.org/wiki/Osu!_Tatakae!_Ouendan