Your mash-up T-shirt is not parody
It happens regularly. An artist is outraged because someone stole their design! And when I click over, I see the design in question is a mash-up between two licensed properties that this person couldn’t possibly have the rights to. In other words, they’re complaining that someone stole the design that they stole.
And I always see the same justifications:
It’s Fair Use (or parody)!
I’m not making any money (or very little) off this!
Wrong, and wrong.
So let’s take a moment to understand Intellectual Property a little better.