I wouldn't say the Oracle games are underrated. They were just underplayed. The games got great reviews, and meet the quality that you expect from being a Zelda game. The problem is that few people played the games when they came out. One of the main reasons was because they were one of the last games that came out for the Game Boy Color, and people were already focusing on the Game Boy Advance. The games are uncommon to find used these days, so I think Nintendo should release them on the Virtual Console so more people can get a chance to play them.