There's a 'Save' button on the touchscreen menu, just select that to save your game.
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.
Of couse, the game is not on the ds or dsi. It's a game card
Pokemon HeartGold can communicate with all the DS Pokemon games. :c)
You need to mate the Pokemon with a Ditto.
The answer is no but you can trade Pokemon from if you have a DS
yes,
Pokemon Heartgold and Soulsilver are the remakes of the old Pokemon Gold, Silver, and Crystal series. Pokemon Heartgold and Soulsilver are for the Nintendo DS.
Some Hoenn pokemon can be found in the tall grass in certain places, but there is another way- You will need a nintendo ds lite/original ds, and another ds (i use a 3ds and a ds lite)you will also need pokemon white, soulsilver/heartgold, and sapphire/ruby. Put your soulsilver/heartgold game in slot one, and sapphire/ruby in your original/lite ds. Turn on your soulsilver/heartgold game and transfer your hoenn pokemon from sapphire/ruby to soulsilver/heartgold using the pal park. Then save and reboot your original/lite ds and go to download play. Put your pokemon white game in your second ds and go to the poke transfer lab, talk to the guy at the end of the building, he will tell you how to do the rest.
Only on the Nintendo DS, DS lite and DSi
HeartGold and Soulsilver
When it is morning on the clock on the ds.
Pokemon HeartGold and SoulSilver both have Wi-Fi capabilities.