This page has game boy codes here are the list of game codes that are on this page.

Captain America and the Avengers 
Castlevania - The Adventure 
Castlevania II - Belmont's Revenge 
Catrap 
Choplifter II 
College Slam 
Contra the Alien Wars 
Cool Spot 
Cosmo Tank 
Cutthroat Island 
Cyraid


The Cheats are dow below.

 Here are the game boy cheats for the games that start with the letter C.


CAPTAIN AMERICA AND THE AVENGERS (GAME BOY)

Game Genie Codes:
Start with 1 lives: 011-DDF-E66.
Start with 10 lives: 0A1-DDF-E66.
Infinite energy: 005-CCE-3B7.
Start with energy at 153: 99A-29F-7FB.
Start with energy at 255: FFA-29F-7FB.
Start with energy at 34: 22A-29F-7FB.
Enemy bullets do very little damage: 017-748-D5A.
Enemy bullets do more damage: 197-748-D5A.
Enemy bullets do much more damage: 337-748-D5A.
Start on stage 1-2: 3E3-A8F-912 + 013-A9F-E6A + E03-AAF-2A9.
Start on stage 1-3: 3E3-A8F-912 + 023-A9F-E6A + E03-AAF-2A9.
Start on stage 1-4: 3E3-A8F-912 + 033-A9F-E6A + E03-AAF-2A9.
Start on stage 1-5: 3E3-A8F-912 + 043-A9F-E6A + E03-AAF-2A9.
Start on stage 1-6: 3E3-A8F-912 + 053-A9F-E6A + E03-AAF-2A9.
Start on stage 2-1: 3E3-A8F-912 + 063-A9F-E6A + E03-AAF-2A9.
Start on stage 2-2: 3E3-A8F-912 + 073-A9F-E6A + E03-AAF-2A9.
Start on stage 2-3: 3E3-A8F-912 + 083-A9F-E6A + E03-AAF-2A9.
Start on stage 2-4: 3E3-A8F-912 + 093-A9F-E6A + E03-AAF-2A9.
Start on stage 2-5: 3E3-A8F-912 + 0A3-A9F-E6A + E03-AAF-2A9.
Start on stage 2-6: 3E3-A8F-912 + 0B3-A9F-E6A + E03-AAF-2A9.
Start on stage 3-1: 3E3-A8F-912 + 0C3-A9F-E6A + E03-AAF-2A9.
Start on stage 3-2: 3E3-A8F-912 + 0D3-A9F-E6A + E03-AAF-2A9.
Start on stage 3-3: 3E3-A8F-912 + 0E3-A9F-E6A + E03-AAF-2A9.
Start on stage 3-4: 3E3-A8F-912 + 0F3-A9F-E6A + E03-AAF-2A9.
Start on stage 3-5: 3E3-A8F-912 + 103-A9F-E6A + E03-AAF-2A9.
Start on stage 4-1: 3E3-A8F-912 + 113-A9F-E6A + E03-AAF-2A9.
Start on stage 4-2: 3E3-A8F-912 + 123-A9F-E6A + E03-AAF-2A9.
Start on stage 4-3: 3E3-A8F-912 + 133-A9F-E6A + E03-AAF-2A9.
Start on stage 4-4: 3E3-A8F-912 + 143-A9F-E6A + E03-AAF-2A9.
Start on stage 4-5: 3E3-A8F-912 + 153-A9F-E6A + E03-AAF-2A9.
Start on stage 4-6: 3E3-A8F-912 + 163-A9F-E6A + E03-AAF-2A9.
Start on stage 5-1: 3E3-A8F-912 + 173-A9F-E6A + E03-AAF-2A9.
Start on stage 5-2: 3E3-A8F-912 + 183-A9F-E6A + E03-AAF-2A9.
Start on stage 5-3: 3E3-A8F-912 + 193-A9F-E6A + E03-AAF-2A9.
Start on stage 5-4: 3E3-A8F-912 + 1A3-A9F-E6A + E03-AAF-2A9.
Start on stage 5-5: 3E3-A8F-912 + 1B3-A9F-E6A + E03-AAF-2A9.
Start on stage 5-6: 3E3-A8F-912 + 1C3-A9F-E6A + E03-AAF-2A9.


CASTLEVANIA: THE ADVENTURE (GAME BOY)

ONE-UP COLLECTION- Skip the first candle, you can break the eleventh 
candle for a 1-up.  Then collect the other 1-up in Stage One, let Simon 
lose a life and repeat the process.  You'll come out ahead by one extra 
fighter every time you loop around.

SECRET ROOM- In the very first stage of this game, there is a hidden room.
In the first stage, you must climb ropes to get through the level.  The 
second to last rope, on the right-hand side of the screen, leads to a 
platform with a tree stump and 2 graves with crosses visible.  If you 
climb up this rope above where it appears to end at a brick wall, you 
will climb into a hidden room with four power-ups.

Game Genie Codes:
Start with 7 lives: 068-5EF-E62.
Infinite energy: 00A-F28-3B7.
Start with 5 lives: 048-5EF-E62.
Start with 2 energy bars: 025-5CF-C42.
Start with 4 energy bars: 045-5CF-C42.
Start with 6 energy bars: 065-5CF-C42.
Start with timer at 2:15 1st stage only: 029-B3F-A26.
Start with timer at 4:15 1st stage only: 049-B3F-A26.
Start with timer at 7:15 1st stage only: 079-B3F-A26.
Infinite time--switch off at end of stages to go on: 004-07F-3B7.
Infinite lives: 006-94F-3B7.


CASTLEVANIA II: BELMONT'S REVENGE (GAME BOY)

TEN FIGHTERS- Enter a password with candles in the first two positions 
and hearts in the second two positions.  When you begin your battle, pause
the game by pressing Start.  You'll have nine fighters in reserve.

SOUND TEST- Enter hearts in all four positions of the password and the 
tune titles will appear.  Press Up and Down and A to start the music and 
B to stop.

PASSWORD- Put a heart in the first box, an eyeball in the second box, a 
candle in the third box, and leave the fourth box empty.  Now press the 
Start button and you will be put in the beginning of Dracula's castle.  
Put an eyeball, heart, candle, and heart in the four boxes and you will 
be in the room with the final boss, Dracula.
 
DEFEAT KUMULA AND NIMBLER- You have to avoid the spray of three energy 
shots each monster shoots from his mouth.  The tridents won't hurt you 
unless you run into them.  Stand on the elevator in the center of the 
room.  Whenever a ram drops his trident, use your whip or special weapon
on his head.  You can also use your whip on the inbound energy balls.

DEFEAT THE DARK SIDE- Dark Side often turns invisible and reappears as a
gem where you're standing.  You can hurt him only while he's in gem form. 
Hit the gem until Dark Side gully materializes as a cloaked figure, then 
run to the other side of the chamber before Dark Side's lightning can 
strike you on the head.  Repeat this technique until Dark Side is dead.

Codes:
Hard Mode (like Castlevania I): Space, Ball, Space, and Ball.
Central Castle: Heart, Ball, Candle, and Space.
Belmont's son's realm: Heart, Candle, Ball, and Ball.
Count Dracula: Ball, Heart, Candle, and Heart.


CATRAP (GAME BOY)

THE CORRECT BONUS PASSWORDS- Enter the edit mode from the main menu, then
input the password from there.  
C140R JH10B EABAM 51W11 C9Q0L HLW14 92R1Q H8KFP 4KATK 08T.
Q2WEC WY5P2 83H29 05HZ0 3T40B 1580N 40P2C R13K3 15HFA MB4K3 K2VV.
517PA 2KR3P 0PN97 2AXT4 MRH1E WKAAF 6LK9B TGLU9 5JFVE PT6N0 30T.

GAIN A LEVEL- To raise a level at any time just push A, B, Select, and 
Start and keep pressing them until you pass the level.


CHOPLIFTER II (GAME BOY)

Passwords:
Sector 1/2: SKYHPPR.			Sector 1/3: LKYBY55.
Sector 2/1: CHPLFTR.			Sector 2/2: BYM5FWR.
Sector 2/3: RGHTHND.			Sector 3/1: GDGMPLY.
Sector 3/2: TRYHRDR.			Sector 3/3: SPRYSK5.
Sector 4/1: CMPTRWZ.			Sector 4/2: GHPYBY5.
Sector 4/3: VRYHPPY.			Sector 5/1: GMBYQZD.
Sector 5/2: LVLYTYZ.			Sector 5/3: GDDYGMZ.


COLLEGE SLAM (GAME BOY)

SHOT PERCENTAGE- Enter the code at the "Today's Match-Up" screen after 
the announcer starts to speak, press: Down, B, Up, Up, and Down.

3-POINT POWER- Enter the code at the "Today's Match-Up" screen after the
announcer starts to speak, press: Down, Up, Up, Down, Left, Right, and 
Left.


CONTRA THE ALIEN WARS (GAME BOY)

LEVEL FOUR ON EASY MODE- Now you can go to Level Four on Easy Mode.  (You
normally will end the game at Level Three.)  After the cinema, you will 
reach the title screen.  At the title screen, move the cursor down to 
password and press Start.  On the password screen, enter the code 21LN. 
You will be sent to the fourth level of Easy Mode with this trick.  
Unfortunately, the game will end after Level Four.

INFINITE LIVES- For unlimited lives, enter the password "B32R".

LEVEL SKIP- Before you begin a new game, go to the password screen, enter 
H2F2 as your password, then begin playing the game as you usually would.
When a level becomes too much for you to bear, push the Start button.  
When you release the Start button, you will safely skip to the next stage
of the game.

Passwords:
2: 3KNT.			3: MDWH.			4: 2S3W.
5: 1Z5C.

SECRET STAGE- Enter the password "BIER".

Game Genie Codes:
Start with Flame Thrower: 017-97B-E6A.
Start with Crush Gun: 077-97B-E6A.
Start with Homing shot: 087-97B-E6A.
Start with Spread shot: 097-97B-E6A.
Get 5 smart bombs after you die: 052-B1B-E6E.
Get 9 smart bombs after you die: 092-B1B-E6E.
Infinite smart bombs: 007-E2C-19E.
Don't flash after getting hit: 010-6FB-7FB.
Flash longer after getting hit: FF0-6FB-7FB.
Invincible: 3EB-81B-4CA.


COOL SPOT (GAME BOY)

Game Genie Codes:
Start with 15 lives: 0F5 76D F7A.
Start with 50 bonus discs: 505 80D E6A.
Infinite energy: FA9 0AC 4C1.


COSMO TANK (GAME BOY)

SOUND TEST- After beginning your mission in the Quest Mode, press the 
Start button to go to the sub-screen.  Then press and hold Down, A, and B.
Press the Start button again and the message "Sound Test 01" will appear.
Change the number by pressing Up and Down and activate the sounds by 
pressing the A button.  When you're done testing, press the Start button 
and resume your game.


CUTTHROAT ISLAND (GAME BOY)

EXECUTE A BONUS MOVE- When you finish Stages One, Three, Five, and Eleven,
you'll learn a Bonus Move.  After you learn a Bonus Move, you must have a 
full Aggression Meter, to execute it.  If you lose your life or 25% of 
your health, the Aggression Meter will reset to zero.  To rebuild your 
Aggression, disengage from the battle or back away from your enemy until 
the meter is fully restored.

DEFEAT GOVERNOR AIMSLEE- Governor Ainslee is waiting for you with his 
cutlass at the end of the Cove in Stage Eleven.  You can defeat him easily
if you trap him in the far left corner.  Open your attack with a series of
Side Kicks until he is pushed up against the left corner of the screen.
The Slide Kicks will knock him off balance.  Once he's down and trapped,
you can hit him with a series of uppercuts or sweeps.  Repeat this until
he resigns.


CYRAID (GAME BOY)

Game Genie Codes:
Infinite lives: 00D-8CB-E6E.
Start with 4 lives: 04E-7CE-F7E.
Start with 6 lives: 06E-7CE-F7E.
Start with 9 lives: 09E-7CE-F7E.
1st nasty on bottom level of stage 1 is removed from the game: 000-729-E6E.
Collect only 1 energy capsule and all enemy robots are destroyed, can 
	proceed to next	room: AFA-4EE-19E.
Skip to 3rd room after completing 1st: 3EE-8AF-4CA + 03E-8BF-F7E.
Skip to 5th room after completing 1st: 3EE-8AF-4CA + 05E-8BF-F7E.
Skip to 8th room after completing 1st: 3EE-8AF-4CA + 08E-8BF-F7E.