any good Nintendo Dual Screen Emulator for Ubuntu?

[ReyQune]

Is there any Nintendo Dual Screen emulator that is playable in Ubuntu?

[DoktorSeven]

(Assuming Nintendo DS handheld emu: ) Desmume is in the Universe repositories (search to learn how to enable these if you have not already), though it's not a very good one as of yet. There are somewhat decent ones in Windows that can be emulated through Wine, though.

[Sockerdrickan]

DeSmuME is good. The one in the repositories might be old though, but that's another story.