From the Super Mario Wiki
Dream Land (Pupupu Land in Japan) is the main location in the Kirby series. It is Kirby, Meta Knight, and King Dedede's home land. King Dedede is the self-proclaimed ruler of this land. Kirby is the one who is always willing to save Dream Land, while Meta Knight may help, or fight Kirby. It is also a stage in the game Super Smash Bros.. However, it is set in the forest of Dream Land, rather than the village. The stage doesn't have that many features, the only one actually is a tree named Whispy Woods who occasionally blows a harsh wind in a random direction. This will push players in that particular direction, making it hard for players to stay on the stage.
The stage got replaced by Green Greens in Super Smash Bros. Melee. Green Greens had a similar gimmick to it, but it added much more on the stage, and the appearance changed a bit. However, Dream Land still made an appearance in Super Smash Bros. Melee, in the form of a Past Stage.