Codes cheats for Probotector

Probotector - Game cheats, tips and tricks for Gameboy Color

Bonus rooms (Castlevania Adventure)
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Level 1
Locate the third set of rolling eyes. Climb the rope into the ceiling.

Level 2
Locate the bridge. Continue moving downward until reaching a location
where rolling eyes are falling to the right with stairs leading in the
same direction. Destroy one of the eyes so it explodes on the second
step from the bottom. Fall down the small hole that is created by the
explosion. Climb down the invisible rope into the bonus room.

Level 3
Just after escaping from the third set of spikes, a room where your
character is in a narrow passage on the left with a solid wall to the
right will appear. Climb the rope almost to the top, then jump off to
the right and through the wall.

Level 4
Locate the room that seems empty except for a large figure that throws
boomerangs. Climb the rope on the right about half way and jump off it,
back to the middle. Your character should land on an invisible floor.
Follow this floor to the center of the screen and climb an invisible
rope through the ceiling.
Bonus life (Castlevania Adventure):
Leave the first ten candles in level one. Whip the eleventh candle to
collect an extra life.

Unlimited lives (Castlevania Adventure)
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Locate the secret room in level 1 that contains a rope. Climb the rope
to the top of the screen and through the ceiling. Collect the extra life,
then find the extra life that appears later in the level. After both are
collected, intentionally die and repeat this procedure.

Level select (Contra)
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Press Up(2), Down(2), Left, Right, Left, Right, B, A, B, A, Start at
the title screen.