Sure, Mario stands out. The toons in Who Framed Roger Rabbit stood out too. Wreck-It Ralph had mismatched styles and themes. It doesn't always work, but it can. I think it works here.
Assuming everybody here is a profesional artist, an aspiring artist or at least someone who loves and cares about game art and this industry, I think we can discuss Mario's art without calling it "trash". It's not about nintendo being above criticism imo, It's just about showing some respect for all the artists who are…