Those are 100% your drawings? Give it some clean outlines and some shading and I would say, those are official artworks. Looking pretty close to the original look. I like the look of his tails in the upper left the most, but the flower pose is god damn cute. Tails is one of my favorite game characters of all time, and if he didn't have his teaser at the end of Sonic movie 1, I wouldn't have dared to watch the 2nd movie, because being honest, those are not very good movies. But Tails looks pretty damn nice in his realistic rendering there.

Oh, and as a general message about your drawings, I think they are looking pretty damn nice too. Otherwise I wouldn't bother to write. =)

Fun side note: I am about to publish a Youtube channel with a 3D animated fox character. He's wearing sneakers, but I gave them the red-white coloring of Tails' classic shoes. Let's see if people get the reference. =)

very cute!!