Sonic and All-Stars Racing Transformed is a Nintendo 3DS racing game from Sega featuring Sonic and a crossover roster of Sega characters. Its transforming vehicle gameplay shifts races between road, water, and air segments.

• Cleaned, tested, and guaranteed to play. Authentic cartridge.
• Arcade racing action built around karts that transform into boats and planes during events.
• Tracks change across different terrain types, keeping each race moving between driving, flying, and boating sections.
• Features Sonic alongside other Sega All-Stars in character-based racing competition.
• Playable in both 2D and 3D modes on Nintendo 3DS hardware.

This entry follows the earlier Sonic & Sega All-Stars Racing with a new emphasis on multi-terrain course design and vehicle transformation.