There are also 14 Jungletac roms that play via the GBA emulator.
...if you're lucky enough to get a Dingoo that can actually run the Jungletac ROMs. The newer ones can't, including the A330.
If you want to guarantee that you have a good selection of your favorite ROMs but don't expect to have a computer when your Dingoo arrives, buy a mini SD card and load it up with ROMs now. When your Dingoo arrives, you can just plug in the card and away you go.
Hrm... is it micro SD or mini SD? I keep getting them mixed up. The Dingoo's slot takes the middle-size SD card, which means you can't use the full-size card, but you can you the smallest size card if you have an adapter.
Ah... I remember now. The Dingoo's slot is made for the Mini SD card. The thing is, those are getting harder and harder to find. However, it isn't hard to find Micro SD cards that come with Mini SD adapters.
I use a 16 GB micro card (with a mini adapter), but that's because I went full-bore on Dingux and have a lot of media on the card (plus my entire DOOM wad library), as well as all of the "second string" ROMs that are not quite good enough to keep on my Dingoo permanently. If you're not going to use Dingux and just want some extra ROM or media storage, a 4 GB or 8 GB card will do.