Dragon Quest Monsters, released in North America as Dragon Warrior Monsters, is the first video game in the Dragon Quest Monsters series. It was released in Japan by Enix on September 25, 1998, and co-published by Eidos Interactive in Europe and North America in 2000. It was the first Dragon Quest game to be released in Europe. The game cartridge is compatible with both the black-and-white Game Boy and the Game Boy Color; a second printing of the game was made after the Game Boy Color itself was released. The game was remade for the PlayStation in a compilation Dragon Quest Monsters 1+2 Hoshi Furi no Yūsha to Bokujō no Nakamatachi. A mobile phone incarnation titled Dragon Quest Monsters i was released in Japan on January 28, 2002.

The game features the characters Terry and Milly from Dragon Quest VI when they were children, before the events in Dragon Quest VI. Dragon Warrior Monsters is often compared to the Pokémon series due to their similar gameplay. Critics set the games apart by noting the in-depth breeding system seen in this game.

In May 2012, a remake of the game for the Nintendo 3DS, titled Dragon Quest Monsters: Terry no Wonderland 3D, was released only in Japan. Later in November 2018, the remake was released for smartphones.