Legal analyst and YouTuber "DocketDog" theorizes: "If Nintendo acknowledges 'Mario Kart 73DS,' they open themselves up to discovery requests. There likely was an internal prototype with a similar name—a test build for dual-screen asymmetric racing. Admitting it exists might force them to reveal trade secrets about the 3DS’s unused hardware capabilities. So they simply let us argue about it forever."
: It introduced the ability to mix and match bodies, wheels, and gliders to balance speed, weight, and handling. mario kart 73ds exclusive
feature to automatically exchange "Ghost Data," win/loss records, and "Community" information with other players you pass in real life. Unique Character Roster Additions and gliders to balance speed