Yes, I know I already own this seventygillion times. And yes – Megadrive Ultimate Collection, which contains this game, was even in my 360’s drive at the time. But still I bought it from XBLA, and of course – I completed it.
With all the emeralds (got the last one in Marble Garden 1, if you care) too. And no Tails. He’s rubbish and needs hot metal things rammed through his face.