GoBoy

GoBoy is a GameBoy/GameBoyColor emulator for Series60.
GoBoy is Free Software, and is licensed under the GPL.

Features:

• Emulates most GameBoy and GameBoy Color roms
• Runs games directly from Inbox
• Full ZipMan integration to run zipped roms without needing to extract to a file
• Source code available

The audio driver required for sound support is available as part of the GoBoy Plus add-on.

You can get GoBoy from WildPalm
And you may find some roms on Shareaza