I would love to try out the pal version for you.
Or just try it? It's literally just two icons with the border from the home menu. The Goomba launches a cart using RegionFOUR, and the Koopa launches the USA System Settings menu, which on other regions, your 3DS will just go black until you force shut down. It's a fantastic proof of concept.
I really was clueless what this exactly does till I saw a video about that badge center. Actually a nice concept! Gonna try it out soon :3
Edit: Works fine, expect the system settings because I have a EUR 3ds.
I've added the EUR patch to the OP, if anyone want's to confirm it works.