For the 11.1.0 and the 9.5, use Browser hax.
First, download the starter kit
here then extract it into your SD card. It should be somewhere on your 3ds. Old 3ds has it on the right side, i don't know about the new 3ds since i don't have it.
- Go to System Settings. Then change the datetime to January 1, 2000, 00:00.
- Use the browser 'Initialize savedata' option, before any page gets loaded triggering the browser-version message.
Next, go to here on the 3ds:
http://3ds.mordor.space/3dsbrowserhax_auto.php
You should have the bottom screen flashing different colours. If it stops on one, go back to the browser and press 'initialise savedata'.
Once you have opened homebrew, press start and exit, then turn the 3ds off.
Now, you need JKSV, just download it
here and then place the files into the sd card. It should install it. Now open the 3ds again with ACNL in and open homebrew. Select JKSV, and then click cartridge for a physical copy or i think its called system apps? or something like that for a installed on 3ds copy.