I Don't know if this will help anyone but since it worked for me I thought I'd Share it,
I've been trying for ages to get the ticket to work and Nintendo doesn't make it possible for us to earn all that is available so I figured cheating only way to go. I looked into all the option for my New 3DS and the only one that seemed to work and be try able for me was NTR cheat Plugin, so I started looking for info, I found that you had to install a CIA (which I got plus Bin file from
here) and install the CIA and put ntr.bin on root of SD card. I started it up and seem to work fine and found myself a cheat.plg or two and tested them, all but the Mii Plaza one worked, cursed, walked away, took a break. I came back and tried again but for some reason the plugin never even flashed green, after finding this thread and thought it describe my setup perfect, EU DS, 4.0 Mii Plaza should be perfect, I finally got TitleID to match and got the green flash at the loading screen thought awesome and then nothing it didn't work, curse the author for raising my hopes and dashing them. took another break but kept my eye on the thread for hopes of new info that might help, this evening while searching for this thread the Google sent me to another thread that said that the it wouldn't work on any other version 3.1 and I read all the pages on here that had appeared on this thread and read a post by EloysOfTheAbyss on page 4
There is no cheat plugin option. If you read op you would know that. It's button combinations to activate. Cheat Menu source wasn't released when this came out.
so thought try NTR 3.1 ( I got from
here ) and replaced the ntr.bin on my SD card, loaded it up and got green flash, then tried the Key for tickets, worked perfect, in fact all the cheats other than Streetpass Mansion colour changing worked perfectly, thanks to Author ^^
TL;DR
Setup: New 3DS XL, SysNAND 9.2, EmuNAND ReiNAND 10.7, NTR 3.1
No plugin's Worked
Got NTR from
here
Got NTR.bin from
here
Got Plugin from
here
Profit
Thank you
TheRoss
Ericjwg
EloysOfTheAbyss