Shorts for what? To conceal his hemi-penis and not-balls?
(Chameleons lack external genetalia)
I understand the asthetic of having distinguishing apparel, especially during transformations, but I like the streamlined design overall. Yooka's yellow belly and broad torso make no sense either (chameleons have laterally-broad sides, not bellies, to absorb sunrays and appear larger. They can huff themselves up a bit like blowfish, too), but it's a design that still suits the characters just fine in their own fantasy. But that's just my opinion.