Mez's Codes...

[Mezmorize]

Wow thanks a bunch lee4!
I was not expecting someone else to put them up for me, that makes me feel bad about taking so long =P

I've recently took somewhat of a higher position at work, and have been putting in a lot of overtime lately.
Been working 10 hour days for years, but it was usually just Monday-Thursday, now I'm working like 12 hours and only having Sundays off.
(Not to mention it's a half hour drive to work, and another half hour going home; each and every day.)

What little free time I've had lately I've just been busy or sleeping and haven't had the motivation to do much hacking.
Good news is I should have have at least a two day weekend this week and things will settle down a little more starting with next Monday.

That was a massive amount of work you did for me, how could I repay you for that?
I promise I'll add my codes to the database as soon as I hack them for now on ^.^ never meant to get so far behind.

[lee4]

Please dont feel bad.
just focus on your job, your health and hacking games.
this is easy to do for me

[Unicode]

[B][COLOR="#cc00cc"]X[/COLOR][/B]#22
[COLOR="#cc00cc"][B]X[/B][/COLOR]#24;
[COLOR="#cc00cc"][B]X[/B][/COLOR]#31 - for various games for Sega Genesis;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#33 - for Cool Spot (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#34 - for World of Illusion Starring Mickey Mouse & Donald Duck (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#35 - for True Lies (W) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#36 - for Sonic The Hedgehog (W) (REV00) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#37 - for Sonic The Hedgehog 2 (W) (REV00) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#42 - for Sonic The Hedgehog 2 (W) (REV00) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#43 - for Sonic The Hedgehog 3 (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#44 - for Judge Dredd - The Movie (W) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#48 - for various Sega Genesis games;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#50 - for Sonic The Hedgehog (W) for Sega Genesis;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#51 - for X-Men (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#55 - for Sonic The for Hedgehog (W) (REV00) [!] for Sega Genesis;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#57 - for various Sega Genesis games;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#60 - for Jurassic Park (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#61 - for various Sega Genesis games;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#64 - for Boogerman (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#65 - for Beavis and Butt-head (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#66 - for Escape From Mars Starring Taz (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#68 - for Earthworm Jim (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#70;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#72 - for Earthworm Jim 2 (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#79 - for Garfield - Caught in the Act (UE) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#80 - for Earthworm Jim 2 (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#82 - for Indiana Jones and the Last Crusade (U) [Sega Genesis];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#83 - for DuckTales for NES;
[COLOR="#cc00cc"][B]X[/B][/COLOR]#85 - for Super Mario Bros. + Duck Hunt (U) [NES] 
[COLOR="#cc00cc"][B]X[/B][/COLOR]#89 - for Super Mario Bros. + Duck Hunt (U) [NES] 
[COLOR="#cc00cc"][B]X[/B][/COLOR]#96 - for Super Mario Bros. + Duck Hunt (U) [NES] 
[B][COLOR="#cc00cc"]X[/COLOR][/B]#103 - for Super Mario Bros. 3 (U) (PRG0) [NES] 
[B][COLOR="#cc00cc"]X[/COLOR][/B]#105 - for Super Mario Bros. 3 (U) (PRG0) [NES] 
[B][COLOR="#cc00cc"]X[/COLOR][/B]#106 - for Chip 'n Dale Rescue Rangers (U) [NES];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#108;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#109 - for Chip 'n Dale Rescue Rangers (U) Game Genie for NES;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#110 - for Teenage Mutant Ninja Turtles [NES];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#111 - for Chip 'n Dale Rescue Rangers 2 (U) [NES];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#112 - for Toxic Crusaders (U) [NES];
[B][COLOR="#cc00cc"]X[/COLOR][/B]#115 - for various NES games;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#118 - for various NES games;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#119 - more codes for various NES games;
[B][COLOR="#cc00cc"]X[/COLOR][/B]#121 - few more NES codes.

X = added to the database

Thanks you much. I want you to do add / fix some more codes, as I made a separate thread for this into "Under Constuction/To Be Added" subforum http://gamehacking.org/vb/threads/83...0063#post70063 to avoid spamming in this thread.

[Mezmorize]

Made a few Game Genie codes for the first game of the Mana series, Final Fantasy Adventure (U), for the Game Boy.

Immunity To Poison
009-5A8-B3C (Decrease health by 0 instead of 2.)
FA9-698-4C1 (No instant death by Poison.)

00D-7EC-E66 Max Gold (This code was already created by Ugetab.)
FAE-3FC-4C1 Infinite HP (This code was already created by Galoob, although I'm pretty sure it also protects from magic attacks.)
001-938-A28 Infinite MP

FAE-D5C-4C1 Weapon Power Meter Never Decreases
00E-F3C-08B Weapon Power Meter Instantly Fills
Note: There is at least two times when these needs to be disabled to properly cut down trees with the Battle Axe.

001-BE8-3BE Infinite Equipped Item Usage (Except Keys)
00B-7EC-3BE Infinite Key Usage

007-1BB-E66 Weapons Attack For Max Damage
003-6DB-08F One Hit Kills (Works with first enemy enemy in the game, didn't really test it further than that, because I used the code directly above this one.)

Being Poisoned Grants Max HP
009-608-E66
FF9-628-E6A
FF9-638-E6A
Note: Your HP will go back down to normal after certain things, such as sleeping at an Inn.

[Mezmorize]

Made a few more Game Genie codes for DuckTales (NES), I'll add them to the database and clean up the page a bit.
There are quite a few duplicate codes (exact duplicates, not just the name of the cheats).

Removes Lots Of Objects
APVELTAL

All Characters/Enemies Are Invisible
AONAPPAL

Removes Some Enemies
AOXUIAAL

Enemies Behave Differently
ALEELAAP

No Music (Only Sound Effects)
ELNETZEP

No Audio
EYXAZAEI

Enemies And Some Objects Are Invisible
ELEEAZEP

Diamonds Appear Before Walking By Them (Instead Of After)
EPSEVGEL

Automatically Have Your Cane Out When Jumping
EIOVVZEY

Gets Items (And Recieve Damage) From Anywhere
EINNAGEY

Walk Up/Pass Thru Some Objects (Right Direction)
EIXVATEY

Hold Right Or Left To Automatically Cane Wack
ESSTTLEY

Walk Over Some Objects Without Having To Jump
EYVSPZEI

Remove Tomato Plant Enemies
APNAAIAL

Remove Bee Enemies
AUUPAPAP

Bees Die Soon As They Appear
ALVOYPAP

Bees Fly Backwards
ENEPZPEI

Bees Fly Downward
ENKOYPEI

Bees Fly Away From You
ENNPTPEI

Remove Bees And Most Apes
EPEUAPEL

Immune To Tomato Plants (And They're Always Attacking)
EIVELIEY

Tomato Plants Die Soon As They Appear
EINELIEY

Some Enemies Die When They Touch You
ESEYIGEY

Taking Damage Does Not Knock You Back
EYUVKLEI

[Unicode]

@mezmorize, you could be make a some GG codes similar to ones in your last post for NES Adventure Island, Mega Man and CastleVania games? This would be a cool.

[Mezmorize]

Sure, I'll take a look at them and see what kind of codes I can come up with.
I'll warn you though I've never really played any of the Mega Man games much before.

In the meantime, here's some more codes for DuckTales:
Indian Enemies Automatically Die
ALOAPLAP

Indian Enemies Can't Jump
AUKEPLAP

Indian Enemies Walk Away From You (Instead Of Towards)
ESNEGLEY

Indian Enemies Don't Throw Spears
ESEAPGEY

Indian Enemies Don't Attempt To Throw Spears
EYXAYGEI

Indian Enemies Hop Around
EYXAZGEI

Skeleton Enemies Die When They Break Blocks
AOEPPLAL

Skeleton Enemies Can't Run
AUXPYLAP

Skeleton Enemies Stand Up And Jog In Place
ESXPZLEY

Skeleton Enemies Stand Up And Die
ESVPILEY

Skeleton Enemies Can't Break Blocks
ESNEGTEY

All Blocks Broken By Skeleton Enemies Contain Food Or Diamonds
EIOAZYEY

Immune To Skeleton Enemies (And They Act Differently)
EYUOILEI

First Mirror In Transylvana Takes You To The Key To Mines
EINPLAEY

[Mezmorize]

@mezmorize, you could be make a some GG codes similar to ones in your last post for NES Adventure Island, Mega Man and CastleVania games? This would be a cool.

I didn't check the database to see what was already made, and only tested these for seconds at a time. If you want, you can add the ones to the database that you think are worthy, since I'm sure you'll be testing them more than me. If not I'll add them to the database later on.

Hudson's Adventure Island (U) [!]
No Music
EOKKKAEL

Mostly No Music
ALXKEPAP

Different Music
AOKGVAAL

Lose Health Faster
AUKGPAAP

Don't Move Legs When Walking
AOXPKIAL

Invisible Health Bar
AOUAVAAL

Fall To Your Death
APVEGLAL

Character Is Invisible
AONAZIAL

Invisible Health Bar And Lives Counter
EOEGALEL

Walk To The Right To Beat The Round
EOXLOLEL

Tops Of Trees Are Red Instead Of Green
EPNUSYEL

After Jumping, You Float In The Air
EPNEALEL
Note: Turn off the code to fall back down.

Start The Game In A Different Area
EUOETAEP

Start With Axe, Axe Powerup Gives Skateboard
ESUAIAEY

Start With Fireball Powerup
ESKAYYEY

Keep Running After Releasing Right Or Left
EISEZIEY

Walk And Run Slower
ESEEIGEY

Run Backwards
EIKATTEY

First Stage Is Different
EYNESIEI

First Stage Is Different
ENEEUIEI

Start With Skateboard
EYOEYTEI

Infinite Health
ENUGLAEI

Infinite Health (alt)
ENUKLAEI

Instantly Beat Round
ENNEPAEI

No Audio
AOOGGTAL

Instantly Stop After Letting Go Of Left Or Right
ALXEIIAP

Get Items From Anywhere
EPUEOLEL

Items Don't Disappear Without Being Picked Up
EIUEVLEY

Powerups Are Worth More Points
ESXEKLEY

Points Continue Rising From Powerups Until You Move
EIOAOLEY

Screen Simi-Auto Scrolls
EYOUEIEI

Eggs Already Busted Open
EPKZNGEL

Enemies Die Soon As They Appear
EPXPZZEL

Snail Enemies Don't Move (Horizontally)
EPOPGTEL

Eggs Stay In Place When Opened
EUXXNLEP

Recieve Powerup Inside Of Egg Without Having To Pick It Up
EUEXSGEP

Eggs Are Recieved Like Powerups
EIVXNGEY

Something Else Comes Out Of Eggs
ESVXNLEY

Skateboard In Egg Instead Of Axe
ESNXELEY

Obsticles, Enemies, And Eggs Are Removed As They Appear
EYUKLPEI

Milk Container Inside Of Egg Instead Of Axe
ENNZKLEI

Can Run Into Some Snails Without Dying
APVKLAAL
Note: Running Into Rocks Kill You.

Touching Obsticles And Enemies Kills Them
EISKIAEY
Note: A powerup also appears after their death.

Touching Obsticles And Enemies Kills Them
EIVGPAEY

Touching Obsticles And Enemies Kills Them (alt)
EYVGYAEI

[Mezmorize]

Hudson's Adventure Island II (U) [!]

Walk Right To Beat The Stage
AOOXPYAL

Walk Right To Beat The Stage (Alt)
EOSXGYEL

Float In The Air After Jumping
EUNKOZEP
Note: Turn off the code to drop back down.

Walk Without Moving Your Legs
ELKXAPEP

Get 2,000 Points At Start Of Round
EUVXOZEP

No Audio
ELEVUPEP

Invulnerability (Cant Pick Up Items)
EIEIEIEY

Keep Running After Releasing Right Or Left
EISZPAEY

Automatically Run, Hold B To Walk
ESEZYAEY

Travel Faster
ESEXYAEY

Infinite Health
EIUIZAEY

Infinite Health (Alt)
EYXSPAEI

Remove Lives Counter
ENXKXTEI

Start Stage With 10,000 Points
ENKKVTEI

Score And Lives Constantly Rise
EYNGNYEI

Ater Picking Up An Item, Score And Lives Constantly Rise
ELNKNYEP

Swim In The Air
EYUZGAEI

Hold Jump To Slowly Float, Let Go To Slowly Fall
EYOLIPEI

Face Opposite Direction When Not Moving
EYEXPGEI

Eggs Already Open, Enemies Automatically Die
EOKIEIEL

Eggs Already Open, Enemies Automatically Die (Alt)
EOKINIEL

Get Items From Anywhere
ELKXGYEP

Items Worth More Points
EUXGSYEP

Slow Motion
EYXIOZEI

Food Fully Restores Health
ENKZXPEI

Food Gives Lives Instead Of Points
EYEXEGEI

Get Skateboard Instead Of Axe From Egg
EISXVZEY

Meat Comes Out Of Eggs
EYEXVZEI

Invincibility Pet Comes Out Of Eggs
EYOZSZEI

Blue Dinosaur Comes Out Of Eggs
EYXZUZEI

Red Dinosaur Comes Out Of Eggs
EYXXXZEI

Purple Flying Dinosaur Comes Out Of Eggs
EYUZOZEI

Purple Dinosaur Comes Out Of Eggs
EYUXEZEI

Key Comes Out Of Eggs
EYUXNZEI

Key Comes Out Of Eggs (Alt)
EYSZKZEI

Key To Secret Room Comes Out Of Eggs
EYKZVZEI

Key To Island Skip Room Comes Out Of Eggs
EYKXSZEI

Snails Travel Faster
EOUXYZEL

Invulnerability
EOXSUTEL

Invulnerability (Alt)
ESSSUIEY

Enemies Die When You Touch Them
ESXSNTEY

Enemies Die When You Touch Them (Alt)
ENSSKTEI

[Unicode]

I didn't check the database to see what was already made, and only tested these for seconds at a time. If you want, you can add the ones to the database that you think are worthy, since I'm sure you'll be testing them more than me. If not I'll add them to the database later on.

Hudson's Adventure Island (U) [!]
No Music
EOKKKAEL - Nice

Mostly No Music
ALXKEPAP - Nice

Different Music
AOKGVAAL - This code really removes music from the game completely.

Lose Health Faster
AUKGPAAP - Nice

Don't Move Legs When Walking
AOXPKIAL - This code removes spirite's animation, though it really doesn't harm gameplay.

Invisible Health Bar
AOUAVAAL - Nice

Fall To Your Death
APVEGLAL

Character Is Invisible
AONAZIAL - Nice, through it makes game harder.

Invisible Health Bar And Lives Counter
EOEGALEL - It removes number of plates and make player's fire weapon invisible too.

Walk To The Right To Beat The Round
EOXLOLEL - Nice

Tops Of Trees Are Red Instead Of Green
EPNUSYEL

After Jumping, You Float In The Air
EPNEALEL
Note: Turn off the code to fall back down. - You can't jump again after jumping once.

Start The Game In A Different Area
EUOETAEP - It really makes you to play only the last section of the game on every area.

Start With Axe, Axe Powerup Gives Skateboard
ESUAIAEY - Nice.

Start With Fireball Powerup
ESKAYYEY - When you pickup the axe power-up, you cannot shoot anymore.

Keep Running After Releasing Right Or Left
EISEZIEY - Nice

Walk And Run Slower
ESEEIGEY - Useless

Run Backwards
EIKATTEY

First Stage Is Different
EYNESIEI - after first stage, all next stages have no enemies.

First Stage Is Different
ENEEUIEI

Start With Skateboard
EYOEYTEI - Nice

Infinite Health
ENUGLAEI - Nice

Infinite Health (alt)
ENUKLAEI - Nice

Instantly Beat Round
ENNEPAEI - Nice

No Audio
AOOGGTAL

Instantly Stop After Letting Go Of Left Or Right
ALXEIIAP - Nice

Get Items From Anywhere
EPUEOLEL - This actually applies only for fruits and Pot Bonus.

Items Don't Disappear Without Being Picked Up
EIUEVLEY - Nice

Powerups Are Worth More Points
ESXEKLEY - This reduces points you get from fruits in bonus stages. It stills good though.

Points Continue Rising From Powerups Until You Move
EIOAOLEY - Some fruits seems are noncollectable with this code.

Screen Simi-Auto Scrolls
EYOUEIEI - Nice

Eggs Already Busted Open
EPKZNGEL - This can harm player if he approach an egg containing Eggplant that drops your health away.

Enemies Die Soon As They Appear
EPXPZZEL - Nice

Snail Enemies Don't Move (Horizontally)
EPOPGTEL - Nice

Eggs Stay In Place When Opened
EUXXNLEP

Recieve Powerup Inside Of Egg Without Having To Pick It Up
EUEXSGEP - Nice

Eggs Are Recieved Like Powerups
EIVXNGEY - Nice

Something Else Comes Out Of Eggs
ESVXNLEY

Skateboard In Egg Instead Of Axe
ESNXELEY - Nice

Obsticles, Enemies, And Eggs Are Removed As They Appear
EYUKLPEI - You cannot pickup any power-ups or weapons with this code.

Milk Container Inside Of Egg Instead Of Axe
ENNZKLEI

Can Run Into Some Snails Without Dying
APVKLAAL
Note: Running Into Rocks Kill You.

Touching Obsticles And Enemies Kills Them
EISKIAEY
Note: A powerup also appears after their death. - You must avoid touching every boss on end of every area #-4 or the game will not continue. Code is nice though because every enemy killed via running into it gives you a Pot Bonus. This code seems best used with nolberto82's "Beat Boss Automatically" code ASOOXLEL to prevent issue with trapping on boss battles.

Touching Obsticles And Enemies Kills Them
EIVGPAEY - You must avoid touching every boss on end of every area #-4 or the game will not continue. Also, it makes you to have a Fairy Bee invincibility, however, having a real Fairy Bee from an egg makes the player vulnerable to enemies.

Touching Obsticles And Enemies Kills Them (alt)
EYVGYAEI - Nice

Thanks. I now waiting for Hudson's Adventure Island 3 codes. I also added your codes for first Adventure Island game from post #158 except ones marked in red in my report above.

[Mezmorize]

Thanks. I now waiting for Hudson's Adventure Island 3 codes. I also added your codes for first Adventure Island game from post #158 except ones marked in red in my report above.

Thanks.
Here's codes for the third game in the series:
Hudson's Adventure Island III (U) [!]

Invulnerability (Cant Pick Up Items)
AOSXUZAL

Float After Jumping
EPNZZYEL
Note: Turn off the code to fall back down.

No Audio
EUSTVZEP

Fall Slower After Jumping
EUVZNZEP

Fruits Appear After Walking By Them (Instead Of Before)
ELOITGEP

Fruits Are Visible As Soon As They're On The Screen
EUEZPLEP

Get Items (And Recieve Damage) From Anywhere
EUVZVZEP

Remove Health Bar
ELNYNIEP

Slow Motion
ESVYPAEY

Keep Walking After Letting Go Of Right Or Left
EIVZIAEY

Hold Down To Stand Up, Otherwise You're Laying Down
ESKXGGEY

Walk Backwards
ESKXLIEY

Walk Without Moving Your Legs
ENUXAGEI

Fruits Disappear Faster
ESNUTIEY

Infinite Health
EIVYSIEY

Infinite Health (Alt)
ESENNIEY

Remove Health Bar
ESONUIEY

Remove Lives, Points, And Fruit Counter
EYKVOYEI

Slowly Float Upwards While Holding A, Let Go To Slowly Fall
EYSXZAEI

Float Upwards While Holding A, Let Go To Slowly Fall
EYEZSZEI

Remove Enemies And Fruits/Powerups
EYNSUAEI

Makes The Score Counter Display Buggy Coordinates?
EYEYVGEI

Picking Up A Fruit Warps You Somewhere
EPKISLEL

After You Jump, You Float
EPNXIYEL
Note: Turn off the code to fall back down.

Can Get Fruits By Walking Under Them
EUKKTZEP
Note: Can't get eggs though.

Fruit Fully Restores Health
ELXZLTEP

Reverse The Functions Of The Left And Right Buttons
ESNZZAEY

1 Fruit Counts As 11
ESSNOIEY

1 Fruit Gives 99 Lives And Lots More Points
ESNYOIEY

Jump Much Higher
EYNXSZEI

Swim In The Air
ENEZPYEI

After Jumping, You Fall Back Down Faster
EYUZSZEI

Don't Kick Eggs
EOVZGZEL

Kick Eggs Further
EUVXOAEP

Touching Enemies Kills Them
EIKZNGEY

Touching Enemies Kills Them (Alt)
ESXZOGEY

Invulnerability
ESEZVGEY

[Unicode]

Hudson's Adventure Island II (U) [!]

Walk Right To Beat The Stage
AOOXPYAL - You can't beat boss stages on every island with this code.

Walk Right To Beat The Stage (Alt)
EOSXGYEL - You can't beat boss stages on every island with this code.

Float In The Air After Jumping
EUNKOZEP
Note: Turn off the code to drop back down. - Actually you can still come down by walking without disabling the code.

Walk Without Moving Your Legs
ELKXAPEP

Get 2,000 Points At Start Of Round
EUVXOZEP - This works only if you doesn't have a dinosaur riding in beginning of the stage.

No Audio
ELEVUPEP - Nice

Invulnerability (Cant Pick Up Items)
EIEIEIEY

Keep Running After Releasing Right Or Left
EISZPAEY

Automatically Run, Hold B To Walk
ESEZYAEY - This works only if you doesn't have a dinosaur riding.

Travel Faster
ESEXYAEY

Infinite Health
EIUIZAEY - Useful

Infinite Health (Alt)
EYXSPAEI - Useful

Remove Lives Counter
ENXKXTEI - It removes score too.

Start Stage With 10,000 Points
ENKKVTEI - You can't receive any score points from killing enemies, power-ups or fruits.

Score And Lives Constantly Rise
EYNGNYEI - Nice

Ater Picking Up An Item, Score And Lives Constantly Rise
ELNKNYEP

Swim In The Air
EYUZGAEI - Sometimes you can't shoot and go backwards.

Hold Jump To Slowly Float, Let Go To Slowly Fall
EYOLIPEI - Pterodactyl (the flying dinosaur) cannot fly with this code.

Face Opposite Direction When Not Moving
EYEXPGEI

Eggs Already Open, Enemies Automatically Die
EOKIEIEL - When entering boss battle in end of every island, this code destroy boss, but the game won't continue and you won't be able to advance on next island.

Eggs Already Open, Enemies Automatically Die (Alt)
EOKINIEL - When entering boss battle in end of every island, this code destroy boss, but the game won't continue and you won't be able to advance on next island.

Get Items From Anywhere
ELKXGYEP - Useful

Items Worth More Points
EUXGSYEP - Nice

Slow Motion
EYXIOZEI - Doesn't work on boss battles, and disables enemies from appearing.

Food Fully Restores Health
ENKZXPEI - Useful

Food Gives Lives Instead Of Points
EYEXEGEI - Nice

Get Skateboard Instead Of Axe From Egg
EISXVZEY - Nice

Meat Comes Out Of Eggs
EYEXVZEI - In some stages a Milk appears instead of Meat.

Invincibility Pet Comes Out Of Eggs
EYOZSZEI - Nice

Blue Dinosaur Comes Out Of Eggs
EYXZUZEI - Nice

Red Dinosaur Comes Out Of Eggs
EYXXXZEI - Nice

Purple Flying Dinosaur Comes Out Of Eggs
EYUZOZEI - Nice

Purple Dinosaur Comes Out Of Eggs
EYUXEZEI - Nice

Key Comes Out Of Eggs
EYUXNZEI - Useful, though it doesn't work on all eggs. The key takes you on the bonus cloud stage with power-ups.

Key Comes Out Of Eggs (Alt)
EYSZKZEI - Useful, though it doesn't work on all eggs. The key takes you on the bonus cloud stage.

Key To Secret Room Comes Out Of Eggs
EYKZVZEI - Useful

Key To Island Skip Room Comes Out Of Eggs
EYKXSZEI - Useful

Snails Travel Faster
EOUXYZEL

Invulnerability
EOXSUTEL - You will die if try to collect a key for Island Skip Room / Secret Room / Bonus stages from an hidden egg.

Invulnerability (Alt)
ESSSUIEY - Just bad code.

Enemies Die When You Touch Them
ESXSNTEY - If player touch the boss on end of every island, you'll be trapped and game won't advance anymore.

Enemies Die When You Touch Them (Alt)
ENSSKTEI - If player touch the boss on end of every island, you'll be trapped and game won't advance anymore.

Unfortunately, most of these codes are bad and have a various errors. Only about the half of them I've added in database.

[Unicode]

Thanks.
Here's codes for the third game in the series:
Hudson's Adventure Island III (U) [!]

Invulnerability (Cant Pick Up Items)
AOSXUZAL

Float After Jumping
EPNZZYEL
Note: Turn off the code to fall back down. - This makes player appear little under ground surface on some stages.

No Audio
EUSTVZEP - Nice

Fall Slower After Jumping
EUVZNZEP - Useful

Fruits Appear After Walking By Them (Instead Of Before)
ELOITGEP - Nice

Fruits Are Visible As Soon As They're On The Screen
EUEZPLEP - Useless

Get Items (And Recieve Damage) From Anywhere
EUVZVZEP - Useless

Remove Health Bar
ELNYNIEP

Slow Motion
ESVYPAEY - Sound plays totally bad.

Keep Walking After Letting Go Of Right Or Left
EIVZIAEY - Nice

Hold Down To Stand Up, Otherwise You're Laying Down
ESKXGGEY

Walk Backwards
ESKXLIEY

Walk Without Moving Your Legs
ENUXAGEI - Nice

Fruits Disappear Faster
ESNUTIEY - This makes on score showing up from collecting fruits and make some underwater enemies to move abnormally.

Infinite Health
EIVYSIEY - Useful

Infinite Health (Alt)
ESENNIEY - Useful

Remove Health Bar
ESONUIEY - Nice

Remove Lives, Points, And Fruit Counter
EYKVOYEI - Nice

Slowly Float Upwards While Holding A, Let Go To Slowly Fall
EYSXZAEI - This same code was made already by @megaman_exe, but I deleted his code from database because it has a dawn error: if you swim high before exit to the end on the level 4-6, this code cause you will automatically finish with a incorrect entering into the exit before you approach enough it. If this happens, after your exit in this way the game will not continue (the rest of the health bar won't be scored as bonus, and game won't take you to the boss battle after this level). Unfortunately, nobody responded to fix that error in this code (not least until I deleted it from database).

Float Upwards While Holding A, Let Go To Slowly Fall
EYEZSZEI - Useful

Remove Enemies And Fruits/Powerups
EYNSUAEI - Useless

Makes The Score Counter Display Buggy Coordinates?
EYEYVGEI - Useless, though it doesn't harm gameplay and makes a fun in the game.

Picking Up A Fruit Warps You Somewhere
EPKISLEL - Makes the game have glitched graphics, and after second warping the game froze.

After You Jump, You Float
EPNXIYEL
Note: Turn off the code to fall back down. - Useful

Can Get Fruits By Walking Under Them
EUKKTZEP
Note: Can't get eggs though.

Fruit Fully Restores Health
ELXZLTEP - Useful. After collecting the first fruit, every next collected fruit will makes health bar go over normal limit and health bar itself will be replaced by various sprites. But collecting a Milk or Meat will revert Energy back to the default maximum.

Reverse The Functions Of The Left And Right Buttons
ESNZZAEY

1 Fruit Counts As 11
ESSNOIEY - Nice. It also makes Milk and Meat are counted as 20 instead of 10.

1 Fruit Gives 99 Lives And Lots More Points
ESNYOIEY - It also gives a lots of points from killing enemies.

Jump Much Higher
EYNXSZEI

Swim In The Air
ENEZPYEI - You'll lose any dinosaur (except the purple swimming one) when using the code.

After Jumping, You Fall Back Down Faster
EYUZSZEI

Don't Kick Eggs
EOVZGZEL - Nice

Kick Eggs Further
EUVXOAEP

Touching Enemies Kills Them
EIKZNGEY - Running into enemies while having an Invincibility bee will kill the player.

Touching Enemies Kills Them (Alt)
ESXZOGEY - Touching an enemy while having a dinosaur causes an instant death.

Invulnerability
ESEZVGEY - No boss appear (Tested on World 4' boss).

Thanks. I added most of your codes for Hudson's Adventure Island 2 and 3 to the dababase. You can find a more codes for Adventure Island series?

[Mezmorize]

Thanks. I added most of your codes for Hudson's Adventure Island 2 and 3. You can find a more codes for Adventure Island series?

I might re-visit them later on, but I've already started on Megaman.
Just like the previous games I only tested these for a couple seconds at a time.

Megaman (U) [!]
No Music (Only Sound Effects)
ELNPLZEP

No Audio
EINKLGEY

Remove Health Bar and Score
APNIZLAL

No Enemies
AOSIEPAL

No Enemies (Alt)
ESOSEAEY

Walk Thru Walls
ASOSTYAP

Walk Thru Walls (Alt)
ASUKSIEL

Walk Thru Walls (Alt 2)
ESOKUIEY

Walk Thru Walls (Right Direction)
EIEOETEY
Note: Enemies can't pass thru walls walking right.

Walk Thru Walls (Left Direction)
ESEPVTEY
Note: Enemies can't pass thru walls walking left.

Some Enemies Move Away From You Instead Of Towards
ELSYPTEP

Some Enemies Move Away From You Instead Of Towards (Alt)
EIVUETEY

Some Enemies Fall Down Thru The Floor
EUXLOTEP

Walk Backwards
EIXPYIEY

Automatically Shoot
EIUOGIEY

Invisible
ESXOYPEY

Enemies Can't Move (Or Be Attacked)
ESOPEPEY

Invulnerability (But Can't Kill Enemies)
ESSGEPEY

Enemies Die Soon As They Appear
EISLVTEY

Enemies Slow Down Directly Beside You
ENSZKZEI

Enemies Move Differently
EYVLOTEI

Enemies Only Move Horizontally
ENEUOTEI

Jump And Hold Either Right Or Left To Fly Across The Screen
ENNOVGEI

Extra Lives Drop From Enemy Kills
EOXGYIEL

Takes More Shots To Kill Enemies
ESVLOTEY

Instantly Climb Ladders
ENNOYYEI
Note: Turn off on ladders that change screens.

If it matters, all these were made on cutman stage.

[Unicode]

I might re-visit them later on, but I've already started on Megaman.
Just like the previous games I only tested these for a couple seconds at a time.

Megaman (U) [!]
No Music (Only Sound Effects)
ELNPLZEP - Nice

No Audio
EINKLGEY - Nice

Remove Health Bar and Score
APNIZLAL - Nice

No Enemies
AOSIEPAL - Nice. It doesn't affects bosses, but removes all power-ups placed in levels, like Energy / Health capsules and Extra Lives and removes lifts on Gutman's stage making passing the level impossible.

No Enemies (Alt)
ESOSEAEY - It causes a massive glitches when boss battle begins and it also removes powerups placed throughout the levels. It also removes the lifts needed for progress some stages of the game (tested on Gutman's stage).

Walk Thru Walls
ASOSTYAP - It works only for breakable blocks.

Walk Thru Walls (Alt)
ASUKSIEL - It works only for breakable blocks.

Walk Thru Walls (Alt 2)
ESOKUIEY - Causes a strange walking through walls and you can't advance (tested on Cutman's stage).

Walk Thru Walls (Right Direction)
EIEOETEY
Note: Enemies can't pass thru walls walking right. - This code totally messes up graphic and entire stage.

Walk Thru Walls (Left Direction)
ESEPVTEY
Note: Enemies can't pass thru walls walking left. - This code totally messes up graphic and entire stage.

Some Enemies Move Away From You Instead Of Towards
ELSYPTEP

Some Enemies Move Away From You Instead Of Towards (Alt)
EIVUETEY

Some Enemies Fall Down Thru The Floor
EUXLOTEP - Nice

Walk Backwards
EIXPYIEY

Automatically Shoot
EIUOGIEY - You cannot access menu with pressing start to pause or change weapons.

Invisible
ESXOYPEY

Enemies Can't Move (Or Be Attacked)
ESOPEPEY - Useless

Invulnerability (But Can't Kill Enemies)
ESSGEPEY - Useless

Enemies Die Soon As They Appear
EISLVTEY - Makes some killable enemies can't be killed at all no matter how time you shoot them.

Enemies Slow Down Directly Beside You
ENSZKZEI - Nice. Makes killing them easier.

Enemies Move Differently
EYVLOTEI - Only side effect from this is enemies shoot only vertically and after killing enemies a single static shot remains where the enemy was.

Enemies Only Move Horizontally
ENEUOTEI

Jump And Hold Either Right Or Left To Fly Across The Screen
ENNOVGEI

Extra Lives Drop From Enemy Kills
EOXGYIEL - Useful

Takes More Shots To Kill Enemies
ESVLOTEY

Instantly Climb Ladders
ENNOYYEI
Note: Turn off on ladders that change screens.

If it matters, all these were made on Cutman stage.

Most of these codes have an errors, so I've added only a few of them.