Shantae and Risky didn't get censored because of Shantae's less realistic artstyle, and because midriffs aren't considered that bad compared to a shit ton of cleavage, which Mythra shows.

Err… both of them still have quite a bit of cleavage. And I suppose it does make sense in a way. Then again, if the Giga Mermaid were in, there'd be trouble tonight considering her ample qualities.