Castlevania II: Simon's Quest (NES 1988) Game Genie Codes

AISKTIAL - Start with more energy
AZSTTIAL - Start with less energy
SZSSYLSA - Infinite energy
PASGLILA - Start with 1 life
TASGLILA - Start with 6 lives
PASGLILE - Start with 9 lives
IZSKZIAI - Start game with 25 hearts
IYSKZIAI - Start game with 75 hearts

- NES Cheats - Castlevania II: Simon's Quest
- Castlevania II: Simon's Quest @ Wikipedia

Source: GameGenie.com