The original R4 doesn't support SDHC cards, any card over 2GB is SDHC.
I recommend buying the Acekard 2 as a replacement, or a 2GB SD Card.
A NDS stands for Nintendo Duel Screen. It is a game console that can play games. Really, how come u dont know.
langa
It depends on the SD card you're using, as well as the game size. Micro SD cards can range from 1GB - 4GB. Most NDS files are 128MB so that is about 7-8 games per GB. However some NDS games are larger and are 256 MB whil others can be 64MB.
Pokemon platinum can work on NDS
Every DS model will work with the Harvest Moon games.
3ds
an English ds plays American games, so i say an Australian ds would
Yes, the pokewalker connects directly to the NDS gamecard itself. Since the DSi can play DS games, it will work with the DSi
Games-engine or hkorz
Yes, a Nds games, Heart Gold and Soul Silver
Only if it is a Nintendo DS. Pokemon Crystal won't work on the DS Lite. No it cant, the NDS can only play NDS and GBA games, the processor does not allow it to run GB or GBC games. Sorry.
You dont, the firmware is used when you turn the system on.