Invader Zim T-Shirt by Scott Weston aka Hoborobo. "Dib and the E.T." is a mashup of Invader Zim and E.T. The Extraterrestrial.
This shirt is sold by TeePublic. TeePublic is an e-commerce platform that connects independent artists with their fans and allows them to sell their art on t-shirts, apparel, and accessories.