I can’t imagine this is the first time this crossover has ever happened, but I like it all the same. As you may guess from the art style, this is actually a shirt you can pick up here.
It’s designed by Nora Evergla and combines two childhood crushes and villains in the form of Bowser the Hutt and Slave Peach. Did kids actually have crushes on Peach? Probably not back when she was a grand total of like twelve pixels. But boyhood imagination is strong, I guess.