Downloaded DS ROMs from the site on my mobile phone can't get them to my emulato

I have a ZTE Imperial 2 mobile phone and use the emulator Drastic I downloaded two ROMs from the site and don't know how to get them to the emulator.

You don'

Draco89... and don't know how to get them to the emulator.

You don't get them to the emulator.
The roms you downloaded will be in a compressed .rar or .7z format, you will have to extract those first and then open the .nds file with the emulator. Now i haven't used Drastic in a VERY long time, there will be a file manager of somesort that lets you find and select your rom file through the emu.