Snowbros DS is a standalone Snow Bros. Arcade emulator for Nintendo DS by Copper. The original Arcade ROMs are required, but not bundled with the download. As the game is still subject to copyright, there is also no way for us to provide the ROMs.

Supported are:

Snow Bros. – Nick & Tom (set 1)
Snow Bros. – Nick & Tom (set 2)
Snow Bros. – Nick & Tom (set 3)
Snow Bros. – Nick & Tom (set 4)
Snow Bros. – Nick & Tom (Dooyong license)
Snow Bros. – Nick & Tom (Japan)