BARCELONA -- On the first day of Mobile World Congress here in Barcelona, SEGA showed Sonic the Hedgehog for the first time on a tablet powered by NVIDIA's quad core Tegra 3. Called Sonic the Hedgehog 4, Episode II, the new mobile game will launch some time in the Spring this year. It will come out first exclusively for NVIDIA Tegra-powered smartphones and tablets in NVIDIA's Tegra Zone before rolling out onto other Android devices after. We got a first hand look at the blue wonder doing his thing on the Tegra 3-powered Asus Transformer Prime tablet in this exclusive video.