Some are specially developed for the dsTwo using the cpu is it safe and will it drain the battery? ds2x86 is one made just for dstwo card.
There is some extra battery loss when using DS2 specific homebrew compared to normal homebrew - Look @ my battery thread (see signature for the link) to see some examples of the difference in battery life (Section 6 has specific DSTwo battery tests)
What homebrew/ emus work?
yes all homebrew I assume for the DS so far works with the ds2.
Not all homebrews work on all flash carts, but it's rare, and it's usually homebrew that has trouble on lots of carts.
I would say ~90-95% of all homebrew will work on the DSTwo - as Rydian has said, usually there are some probmatic homebrew that won't work (DSOrganise is one - it'll work but only if you have Wifi turned OFF)
- I've usually found that those that insist on being run from
ONLY the root directory can cause problems IF you use the standard 'plugin menu' of the DS2, but if you use the alternative 'imenu' or 'Bagplug' you can get around this issue...
In the earlier days of the DS2 (firmware version