That's fine. It's not permanent right?placedI know in Pokemon it stops the time based legendary Pokemon from showing up (entei, I think terrakion, etc). Other than that no idea.
Games using time-based events system (such as Animal Crossing: New Leaf or Pokemon Rumble World) will tell you you're a bad guy, and it can mess with your save.
No, it just stops it for 24 hours. I was trying to get azelf or something and I realized I hadn't changed my 3ds for DST, but after I did that I had to wait for the next day.That's fine. It's not permanent right?placed