Golden Sun Team
Golden Sun Team (aka GST) were the first Release Group to provide dumps of commercial Nintendo DS games.
They are believed to be very close to the NeoFlash company; releasing encrypted roms that will only work on NeoFlash hardware to generate sales. Due to this all of Golden Sun Team's releases have been nuked.
When the NDS Rom Dumper was released it seemed GST switched over to encrypting and releasing dupes or roms already released by other groups.
And finally with the public release of the GST Universal Patcher GST as a group seemingly went defunct.