Things with as many details as this one take about a day. I still go about my day but instead of engaging in focused gaming or just doing nothing while idling, I work on the drawing. I should time myself to see exactly how much time goes into one of these.
Toad: My point was that it's become, "Sonic vs. Mario! Snake vs. Mario!!" rather than an the most epic multiplayer Nintendo game ever, used for you and your friends to battle Nintendo characters. I know what I'm going to be doing first when I get the game, and it's not going to be making Mario and Sonic fight each other.
I'm kind of late, and should have drawn this in October... It wouldn't have looked as good, though. Two months can make a difference.