Hello, i want to do a speedrun of a nds game but I have a problem, in the emulator the game goes slowly and in the dsi i can't record, how i do for recording in the dsi or that in the emulator game go quicklily, sorry because of my English but I am spanish.
Your english is fine.
Anyway, did you try other emulators ? I know some NDS games runs better on specific emulators (yeah NDS emulation is weird like that), as for the DSi... well... if you can't use a capture card, do you have a webcam or something ? i guess that could work instead.
Also, if the emulator is the one recommended by the community for your game, then maybe it's your computer ? I, personnaly, had problems with NDS emulation,k i didn't have enough GHz back then, wich caused the emulator to run VERY SLOWLY and crash sometimes.
Personally when it comes to DS games I point a camera at it. Very poor film quality, but proof is proof.