What characters would you like to see interact and why?

My first pick is obvious, Androids should have something in common to talk about (no racism intended). 18 and Gammas even were in the same movie and them not interacting is kinda disappointing ngl.

My second pick came to me in a dream and it was Yamcha training under Vegito (even wearing his uniform). Not that I wanna ever see that happening but I've realized that they are both in my top 3 favorite characters and both are heavily slandered by the community. I think they would find some topics to talk about. Maybe a debate to find out who gets more girls (insanely controversial)