For the past few days, I couldn't seem to find my AC:NL cartridge. I put it under my bed for safekeeping along with my AC:WW cartridge. I looked everywhere. This also happened with my Mario Kart DS cartridge (which is still lost today). I promise if I find it again, I'll try my best to put it in a extremely safe place. So for now, I have to look foward to buying a new copy.
That's terrible. I can't say there is anything we can do on the forums, but sometimes it's in places you wouldn't believe it would be. I found my Tomodachi Life card in my suitcase, (When i swore to secrecy I left it in my 3DS bag,) but everything depends. Good luck.
Ahh, that's too bad. I really hope you find it soon. How long did you have your town? I can't get your game back, but I can help with items or bells if you end up getting a new one. Just send me a pm.
I did that once with my WW cartigae. I swear I dropped it in my dad's truck between the seats, but I never looked for it and spent months without playing it. The stupid thing is I thought I knew where it was but never looked because I kept doubting I actually dropped it. Don't give up hope!