Dragon Quest V: Tenkuu no Hanayome

Dragon Quest V uses basic role-playing video game mechanics seen in the rest of the series, which includes leveling up by gaining experience points through battle, first person turn-based battles, and equipping weapons and armor. Something new to the Dragon Quest series is the ability to tame monsters into the player’s party. The monsters can be used in battle and level-up like the human characters. Monsters sometimes request to join the Hero after battles if the party is strong enough. There are a total of 71 monsters that are capable of joining the Hero’s party

Source: TheGamesDB