Sonic Colors (U) ROM < NDS ROMs

It's a very good Sonic game, the quick-fire nature means it's perfect for its hand-held platform, and if you're only going to pick up one Sonic for your DS, Sonic Colors is definitely your best bet.

Sonic Colors (2010) - Download ROM Nintendo DS

Sonic Colors ROM Download for NDS

Sonic Action 4 Pack, Sonic Wiki Zone

Sonic Colors - NintendoDS (NDS) ROM - Download

Rumour: Sega Will Re-Release Sonic 3 & Knuckles In A New Sonic Collection

Sonic Ds

Nintendo DS Full Europe+World Romset (No Intro) [.NDS.7z] : Free Download, Borrow, and Streaming : Internet Archive

Sonic Colors (U) ROM < NDS ROMs

Sonic Colors (U) ROM < NDS ROMs

Repack] DS-Scene Rom Tool v1.0 build 1215 (Includes CMP and AP Database)

Sonic Colors (USA) Nintendo Wii ISO Download - RomUlation