I'd consider "Unlikely Crossover" and "About Time" to be mutually exclusive. Go with one or the other. Going with the latter for this being a foregone conclusion.
Luigi: Hey Libeccio, did ya ever wonder where a baby comes from?
Libeccio: Well you see Luigi, when a paisano puts his spaghetti noodle in a mama mia's ravioli, a little bambino covered in prosciutto comes out about nine months later.
Luigi: What does any of that have to do with babies? Libeccio, I don't understand.
Luigi: Hey Libeccio, did ya ever wonder where a baby comes from?
Libeccio: Well you see Luigi, when a paisano puts his spaghetti noodle in a mama mia's ravioli, a little bambino covered in prosciutto comes out about nine months later.
Luigi: What does any of that have to do with babies? Libeccio, I don't understand.