Sadly, it has become a staple of the genre. Even cleaner ones, like Smash Bros, aren't completely free of it. It astonishes me that something you'd think would improve as people become more aware of the damage these images can cause, seems only to have gotten much worse over the years. Japanese games, in general, seem to have fetishized women to especially disgusting lengths. It's a shame, and it's one aspect of the medium that holds it back from being taken more seriously, in my opinion.