Talk:Kami and Demon King United Piccolo/@comment-43353227-20190801082523/@comment-38754633-20190801083238

The fusion category is for units which perform the Fusion Dance, like Gogeta or Gotenks.

And Broly will never be added to Rivals, as he will never fight alongside his enemies.

At the top of each category page is a short description which units belong to it. That may answer some of your future questions.