just go to the nintendoes options and change the time.
Chat with our AI personalities
You can fast forward time by going to your D.S. or D.S.I. settings and change the clock/date. This doesn't work for Wi-Fi.
Yes, you can. Pokemon HeartGold uses the time from your DS settings. So, change the time on the DS and the time in Pokemon HeartGold will change with it.
O.O you can't and why would you want to?
nothing.
u have to change your ds time and date then your Pokemon games time and date will be the same