Hermit64 is probably the most unique boss of the Wild Hearts. When you are en route to her, you will gain control of a slick car. With the roads so wide, you are encourage to make large turns. Turn long enough and you will start to drift.
The longer you hold a drift, the more points you will earn. There are tons of long and wide turns on the road, so try to get in as much drifting as you can. You will need it for the gold rank!
When you reach Hermit64 herself, you will notice she is alone. Pretty brave, right? Well, she does not need any backup with her powerful technology - her special visor turns The Fool into a game cartridge, and she "plays" her!
The first phase of this is a first-person section. You will need to guide yourself so that you do not run into any of the illuminated panels. Be sure to grab the hearts along the way.
The second phase is a sort of 2D arcade shooter. The Fool's head will appear, and you can move her all around to dodge obstacles and collect hearts. Eventually you will come across Hermit64's heart, and it is a big one at that.
Her heart will fire a barrage of missiles towards The Fool's location, and they explode together resulting in a big explosion, so be sure to steer clear. After a while mash quick-time prompt will appear, and that is lights out for Hermit64.