I've always TT'ed by changing the system clock. Is there any difference/risks involved with TT'ing with Isabelle? I'm kind of nervous about it, since I already have 4 characters, and can't make a new save file to check things out...
I posted this about a week ago, so I'll just copy/paste it since it's basically the same answer:
Generally speaking, TTing with the ingame clock differs from using the 3DS clock in that you save automatically every time you TT. Because you have to use a pre-existing character to TT ingame. If you use the 3DS clock, you don't have to use a pre-existing character, so nothing saves until you log in as one. This means you can make a new character (which doesn't save until the tent/TPC business is done) to check who's moving/where someone's moving to/what flowers grew/whatever without any consequences.
TTing with the 3DS clock is like TTing with a safety net. If you don't like the results, you don't have to save them.
TTing ingame is the real deal, every time.
If you already have 4 characters, and haven't been using the "make a new character to scout before you save" technique, then basically they're the same and you've just been doing a ton of extra fiddly work for nothing. xD; TTing with the ingame clock is a lot faster and less confusing, in my opinion.
