Does anyone know if it's actually 100% impossible to get the 10th villager to move out? I'd like to TT out my 10th villager but I probably would just leave my current 10 if I'd have to get rid of someone else first. If anyone has successfully done this I'd love to hear about it!
It absolutely isn't impossible. My 10th villager in my old town, Roald, pissed me off because he moved in the worst spot possible. I don't TT much, if anything I just TT to the next day to get double the items and then TT back to normal time, but a few days (in both ACNL time and real time) later Roald pinged me and said he was moving, and even though I wasn't close to him at all, he STILL kept his word with moving when I said "see ya!" to him.
So, from first hand experience, it's not impossible. Just maintain a small friendship level with them I guess? Maybe I was just really, really lucky.