Aqua Star is a very wet planet located in the vicinity of Planet Popstar. Most of Aqua Star's Surface is water, so most of its land is made up of small tropical islands and sandy beaches, although there is at least one small forest (surrounding a large river) here as well. Many of the islands here are linked together by small wooden bridges. There are also many waterfalls found on some of the larger islands. The sea of Aqua Star is so vast that there are underwater caverns and large mountains in the water. The enemies of Aqua Star are nearly all aquatic, as is the level's boss, Acro, a returning boss from Kirby's Dream Land 3.