Tiger Millionaire is an episode of Steven Universe focusing on Amethyst and her relationship with Steven. It's the first episode of the show to focus more on specifically her rather than the Crystal Gems as a whole. The original 5 seasons of Steven Universe focuses on Steven helping with the gems' story arcs and what they want/need than his own. It was until the epilogue series Steven Universe Future where he focuses more on what he needs. This episode is more of Amethyst's time to get a bit of development. The episodes relating to Tiger Millionaire are the episodes where Steven Universe touches wrestling. There is a second episode about Tiger Millionaire if I remember correctly, though it's not season 1. Season 1 is the season I rewatched most recently and the most nostalgic, so obviously this Tiger Millionaire is obviously the more memorable one.