not allowed to talk about where to get roms, against our rules.
Also, no emulators properly support that game.
I hate being that guy, but buy a second hand 2DS. It's relatively cheap, compared to other consoles out there.
If there's no shop around you that sells it, then tough luck.
Existing emulators hang the game, crash the game, very choppy progress,
and that can happen even if you have a good computer/GPU/ram etc.
There isn't really a way around it..
Sorry I can't be much help beyond this.