I have to assume Timmy is joking. Here is Wonder Man in his Safari Jacket look:
So casual! So dated! So ridiculous.
I can’t find an image of his current look, but here is Wonder Man in a lot of different costumes (most of them terrible):
The second one to the right is one that looks best to me. Though the fifth one is pretty good too.
Wonder Man likes to wear sunglasses.
For a while he used to turn into a crackling figure of energy when he used his powers (which is mostly just to be strong and fly) and I liked how he looked then:
No sunglasses there.