pokeemerald-ex-speedchoice VS desmume

Gonna assume it was Emerald EX Speedchoice. You can find it here and also in the video description, assuming this is what you were referring to

I'd like to play Pokemon Emerald EX Speedchoice, which I understand to be this: https://github.com/ProjectRevoTPP/pokeemerald-ex-speedchoice. The randomizer jar included doesn't save any output for me, but my Java IS up-to-date, and other randomizers don't work with this specific ROM. Does anyone have any tips?

citra is for 3ds games. while it should be compatible with ds games since the physical consoles are, this isn't true of the emulators. http://desmume.org/ has what you need.

Did you get it from the project's GitHub or official website? The emulator is known, so unless you got it from an unknown source, it should be fine. If you're still worried, you can run a virus scan at any time. If you want to ask more about it, ask in more relevant subreddits, i.e. r/EmulationOnPC.

Are you using the latest stable build, 0.9.13? You can also try melonDS instead.

github.com/TASEmulators/desmume/releases/tag/release_0_9_13

You should probably emulate the games, your 3DS is unlikely to be found Here is an Emulator r/roms is a good resource for ROMs

DesMuMe (DS emulator for Mac and Windows): DesMuMe Pokémon Mystery Dungeon: Explorers of Sky ROM: PMD:EoS

RetroArch - pcsxr - stella - nestopia - DeSmuME - OpenEmu