Sure. Item layering... When you equip a shirt to your avatar, and then try to put another, different shirt on top, it doesn't work. Usually the second item replaces the first. In tektek's Dream-Free, you are able to work around that problem and equip two items that could not be equipped at the same time on the avatar you are working with. That's how I was able to get Felix's shirt and shoes to look correct. It's not something you can actually achieve on Gaia, though. It's just something to do for fun.
Making your character look like that would be impossible. I think, if I can remember correctly, I was using the dream free tektek, which lets you use all the items in any layering format (usually impossible layering on Gaia)