The Oracle series marks a very unique twist in the Zelda kingdom. While releasing two games that connect in some fashion isn’t new at Nintendo (the entire Pokémon series comes to mind), it was entirely new for the Zelda series. It also didn’t come out of Nintendo directly, as these games were crafted by Capcom.
Another odd twist is that there was supposed to be three games, but due to various reasons they cut it down to two with a special ending that could only be had by owning and completing both games. Due to the nature of these games getting released at the same time and having a lot of similarities, along with a combined overall ending, I have decided to group them together in this special case of figuring out why someone may prefer these titles over all of the rest in the series.