are you sure that it was the first? the lines are so perfect! did you use watercolors? pastel colors? oil pastel? watercolors? pencils? I see it as if you had spent all those materials but with a logical and very accurately. ^-^
I can't entirely take Ghirahim seriously, even if he is a good challenge. He just seems too camp to be a serious villain. Until he fights. Though the tongue flicking and bodysuit are a bit disturbing... Excellent artwork, though. Top work.