Castlevania II: Belmont's Revenge

Not to be confused with Castlevania II: Simon's Quest.
Castlevania II: Belmont's Revenge is a platform game released for the Game Boy in 1991. It is the second Castlevania title for the Game Boy and serves as a sequel to the previous title, Castlevania: The Adventure. Belmont's Revenge is included in color in the fourth volume of the Konami GB Collection compilations. Set fifteen years after the events of Castlevania: The Adventure, Dracula returns and kidnaps Christopher Belmont's son Soleiyu at his coming of age feast, and turns him into a demon. With Soleiyu's mystical powers, Dracula retakes human form and rebuilds his castle, forcing Christopher to confront Dracula once again to save his son and Transylvania.