Boktai: The Sun Is in Your Hand is the first Game Boy Advance game that uses sunlight to influence gameplay. In the game, you’ll follow the adventures of Django, a young vampire hunter on a quest to rid the world of evil. As Django, you must overcome traps, defeat enemies, and fight through the deepest parts of dungeons. Watch out for the amount of sunlight–Django is stronger by day, while the vampires are stronger by night. The game features a solar sensor on the cartridge and a real-time clock system.
Bokura no Taiyou
Boktai: The Sun Is in Your Hand