They've apparently trademarked Wario and Waluigi in reference to clothing and costumes:
http://www.japanesenintendo.com/post/161422156759
Now admittedly, this is probably just to stop companies that sell copies of their characters' clothing without giving anything to Nintendo. But come on. Wario and Waluigi clothing as merchandise? Who here wouldn't buy that?
http://www.japanesenintendo.com/post/161422156759
Now admittedly, this is probably just to stop companies that sell copies of their characters' clothing without giving anything to Nintendo. But come on. Wario and Waluigi clothing as merchandise? Who here wouldn't buy that?