Sonic Racing: Silver's Car vs. Knuckles' Monster Truck (378 pieces) $40 See at Amazon See at Lego Store See at Best Buy Sonic Racing: Speedster Lightning Race Car (126 pieces) $10 See at Amazon See at Lego Store See at Best Buy Lego Mario Kart characters can now compete against Sonic the Hedgehog and Knuckles thanks to the launch of the first Sonic Racing: CrossWorlds Lego sets. Exactly one year after Lego Super Mario expanded beyond platforming playsets with buildable karts, Lego Sonic the Hedgehog has made the leap from platforming to the racetrack. The Lego Sonic Racing launch lineup includes Sonic's Speedster Lightning Car and a two-pack featuring Silver's Car vs. Knuckles' Monster Truck. Continue Reading at GameSpot