Boktai Cheats - GBA

Dark Lens
Successfully complete the game to unlock the Dark Lens.

Dark Frame
Successfully complete the game two times to unlock the Dark Frame.

Chaos Battery
Unlock the Pink Solar Tree under the hard difficulty setting then complete the game.

Dark Gun
Combine the Dark Lens, Dark Frame, and Dark Battery.

Control title screen
Vary the amount of sunlight that hits the sensor to control how fast the rays move from the sun at the title screen.

See sunrise and sunset times
Use the following trick to see the sunrise/sunset time without entering an Immortal Dungeon. Press [Start] at the "Select Menu" screen. Where it normally displays the time, it instead will show the sunrise time. Press [Start] again to see the sunset time.

Defeating Dracula
When you fight Dracula, go to the skylight and cover the solar sensor with you hand. Make sure that no sunlight gets into it. Then, when Dracula appears under the skylight, remove your hand from the sensor. You will drown him with sunlight, allowing an easy victory. This trick works best on a sunny day.

Defeating Boks
Use a Spear Frame. It will either stun them for awhile or kill them.

Fooling the solar sensor
Put the sensor in front of a black light. It will respond with almost full, if not full, solar energy.