Official New Game Genie Code Thread

Hello again mr. Tony Hedstrom,


I would like to ask your opinion on the following subject:

Some 2 years ago, Barone came up with a hack for Robocop vs Terminator which removed the top black border of the game, increasing the viewable area of the game.

https://www.sega-16.com/forum/showth...l=1#post796533

https://www.romhacking.net/hacks/3727/


And according to him: "... Anyway, it always bothered me that the MD version had a black border and the SNES one didn't. So I was checking animated tiles in games the other day and I realized that the black border was pretty much a window mask over plane A.
The discovery is much cooler than the hack itself, which is like changing three bytes in the ROM."


Would it be possible to achieve the same result of Barone's hack by entering a GameGenie code?

He mentions that he changed 3 bytes in the ROM. This can be done with Game Genie codes.

EDIT: Game Genie codes modify ROM addresses. 3 bytes would take either 2 or 3 codes depending on if any of the bytes were sequential or not.

Quote:

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Originally Posted by Tony H

He mentions that he changed 3 bytes in the ROM. This can be done with Game Genie codes.

EDIT: Game Genie codes modify ROM addresses. 3 bytes would take either 2 or 3 codes depending on if any of the bytes were sequential or not.

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Just as I suspected. Thanks! ;)

I will try to find the bytes (or maybe I will have to ask for Barone's help on this). :roll:

YAY! :D

I made it! :p

Thanks go to Tony for the tutorials and credits of the hack to Barone, of course. ;)

Here are the codes:

Robocop vs Terminator (USA) - No black border on top

KJAT-BLNS
AC5V-RAAZ
AC5V-TACK
ADCV-TAGV

Nice work!

A couple new Sonic Spinball codes...

Sonic Spinball (Genesis/MD)

AGRA-4AA2
Level 1 boss: Only takes 1 hit to destroy his tail.

PCGT-9N06
Level 1 bonus stage: Only takes 1 hit to free each of the animal friends.

DJ2A-6A60
Level 2 boss: Platforms at top of boss area won't drop (keeps you from falling).

AJVA-6A6R
Level 2 boss: No steam bursts at the top of the boss area. May affect other things in that level as well.

AFKT-6AF6
Level 2 boss: Only have to hit a head once to destroy it (destroy 4 heads to defeat the boss).

AETA-8AH0
Level 3 boss: Only takes 1 hit to break the tubes.

PLFT-9TXJ
Level 3 bonus stage: Only takes 1 hit to destroy each chicken.

ALYT-6A5N
Level 4 boss (Robotnik): Side windows never break (the windows that the socks throw you against).

AGKA-8AEJ
Multi-ball stages: Only have to hit the crab once to win.

C8KA-8AEJ
Multi-ball stages: Only have to hit the crab half as many times to win.

A0XA-8AG4
Multi-ball stages: Start with 5 balls at once instead of 3.

FMBA-5N08
Collecting one emerald opens up the boss room for levels 1 and 2. Make sure this code is turned off before starting levels 3 or 4 if you are using the other code that lets you collect 1 emerald to open the boss room in levels 3 and 4 (in other words, you can't use both codes at the same time). Code may stop working if you collect a second emerald.

FMBA-5Y08
Collecting one emerald opens up the boss room for levels 3 and 4. Make sure this code is turned off before starting levels 1 or 2 if you are using the other code that lets you collect 1 emerald to open the boss room in levels 1 and 2 (in other words, you can't use both codes at the same time). Code may stop working if you collect a second emerald.

GelmiR, 4 different types of jump codes for this game. Pretty sure you can use any combination of codes if you'd like. Just be careful not to jump too high above the top of the screen, or you may get stuck (although you can sometimes just walk Left or Right to drop back down).

Also working on a code that lets Fred throw a bowling ball. No enemies around to hit, but still kind of neat to see that it works.

Still haven't figured out how to advance to the second level.

The Flintstones (Ocean)(Prototype) Genesis/MD

These codes are for the prototype where Fred starts on top of the dinosaur. This is not the same game as the regular "Flintstones" game.

RFLA-A6VJ
Jump in mid-air (multi-jump). If you hold down the jump button, you will keep climbing until you release the button, or you can keep tapping the button to do multiple jumps in mid-air.

6BKT-AAFE
Moon jump (can jump as low or as high as you want by releasing the button).

ABLA-B336
Jump higher.

ABLA-B136
Jump much higher.

CBBT-AAGJ
Less gravity (you'll jump higher with slower movement and easier to control). Can be combined with the other jump codes to jump even higher.

1WEA-AA92
Don't fall when you walk off ledges (walk on air). Press jump to drop down.

Tony,

Can you help me on this code for Super Mario Bros. 2 (J)

Replace Poison Mushrooms With a Coin

Mezmorize did the original code on Gamehacking, But he didn't make one with a coin

1ups - LEXAXPGA
Power-Up - PEXAXPGA
Star - ZEXAXPGA

Thanks for the Flintstones codes, Tony :) Tested them all, they all work for me as described. I haven't been able to reach that second level either, I'm not sure how people do it. I've seen a screenshot with a password to get there, but the password screen doesn't seem to work. Also don't remember reading about the second level in the Lost Flintstones / Super Star Wars topic.

Quote:

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Originally Posted by KnightWarrior

Tony,

Can you help me on this code for Super Mario Bros. 2 (J)

Replace Poison Mushrooms With a Coin

Mezmorize did the original code on Gamehacking, But he didn't make one with a coin

1ups - LEXAXPGA
Power-Up - PEXAXPGA
Star - ZEXAXPGA

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I'm not currently working on NES codes, but this is something you can do yourself.

Open up one of those codes in a Game Genie conversion program (several of them on the internet). It will show you the address, the value and the compare value. What you'll want to change is the value. In the 3 codes you listed, they use the values 01, 02, and 03. Start by trying other values until you find the one for coins. Try 00, 05, 06, 07, etc.

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GelmiR, I'll see if I can figure out how to get to the second level. Must be a way.

Here's a completely useless code that shows Fred throwing a bowling ball whenever you press A...

BKDT-AAHE

I'm sure I could get it to work on a different button besides the jump button, but not really worth the effort, since there aren't any enemies to hit with it. lol.

Quote:

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Originally Posted by GelmiR

Thanks for the Flintstones codes, Tony :) Tested them all, they all work for me as described. I haven't been able to reach that second level either, I'm not sure how people do it. I've seen a screenshot with a password to get there, but the password screen doesn't seem to work. Also don't remember reading about the second level in the Lost Flintstones / Super Star Wars topic.

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May have found a hint on how to get to the next level. On the link below, scroll down until you get to the part where is says Zones, The Quarry. Says something about some hidden steps.

https://hiddenpalace.org/News/Holida..._-_Flintstones

Quote:

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Originally Posted by Tony H

May have found a hint on how to get to the next level. On the link below, scroll down until you get to the part where is says Zones, The Quarry. Says something about some hidden steps.

https://hiddenpalace.org/News/Holida..._-_Flintstones

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Thanks Tony, I'll give the level another look. Though Hidden Palace has a YouTube video of the proto themselves, also only of the first level. But then there are screenshots of the second level...
I wouldn't say the bowling ball code is useless, I'm still going to test it. It will still be interesting to see :) But in case Hidden Palace uncovers a more complete version some day, I wouldn't put too much time in this early proto.

When you get bored with Flintstones, I was wondering about a code for Smurfs that I'm really interested in. We've already done that game, so no worries if you're done with Smurfs :P What I'd be interested in, is a multi-jump code like you did for Addams Family, QuackShot, and probably others. Thanks in advance!

Edit: Flintstones bowling ball code works :) Love how it appears out of nowhere, lol... I think I have to try the SNES version and compare. Already saw a video in which you need to find the bird that sounds an alarm (end of work day) to trigger the next level. As this bird doesn't appear to be in the level, I don't know if/how it's possible to get to another level. Also non-placed objects seem might (haven't seen enough SNES) the reason to not being able to make that initial jump.

GelmiR, didn't have any luck with the multi-jump code for Smurfs.

On The Flintstones Ocean Prototype, I think I found the RAM address that determines what screen/level you're on. By changing the value of this RAM address, I can control which screen or level shows up, and I also made a Game Genie code that lets you test different values. I can get all of the screens to show up that we've seen so far (level 1, the Credits screen, the Hi-Score screen, etc), but haven't found the value for level 2 yet. Here is the test code if you want to spend a little time with it...

8162:78xx
Replace xx with the value you want to use. Some I've tried: 8162:7802 = Shows Option screen when you select "Start". 8162:7804 = Shows Hi-Score screen. Most other values I've tried just gives me a blank screen.

It seems like level 2 is in this prototype somewhere because of the screen shots, so I may have the wrong address and will spend some more time trying to figure it out.

EDIT: GelmiR, don't bother doing any testing with that code, I'm pretty sure I found the right one. Just need to do some testing and then I'll post the results. Fingers crossed. :-)

Got level 2 figured out. Level 2 is kind of unusual. Let me know if you have trouble finishing it, and I will make some codes.

The Flintstones (Ocean)(Prototype) Genesis/MD

AEDA-AADT
Start on level 2 (reset game once code is enabled). It appears that level 2 is only accessible with cheat codes (I couldn't figure out how to exit level 1).

ATDA-AADT
See several different screen shots and the continue screen (reset game once code is enabled and select "Start").

Thanks anyway for trying with the Smurfs code :)

As for Flintstones, great! I look forward to giving these a try. Cool that you got it to work, wonder how they got the screenshots for the 2nd level. Without it, you may not have known there even was a second level? Anyway, will get back to you after I tried them. Cheers!

Tried the codes, they work as described. Interesting! Tried the second level with lots of scum-saving, mostly because I wanted to know if there was an end trigger in the level. But ultimately I couldn't catch Bamm-Bamm, Pebbles, AND Dino... About those screens, I think I've seen some of them with characters in them. Maybe I'll try the SNES version, but I think I'd still prefer to wait for a more complete Mega Drive version before really getting into this game. Thanks again :)

GelmiR, one more code for the Flintstones that will help with the second level. I was curious what was at the end of the level, and like you, tried several times but couldn't finish it. This code allowed me to finish it on the first try.

This code will let you bounce everyone back up, even if your car isn't underneath them, as long as they are above, or in front of your car. The only way they will fall and die is if they fall behind your car, so make sure you keep your car towards the left side of the screen when in doubt. You'll see what I mean once you try it. I can make a second code to keep them from falling all the way when they are behind you too, but doesn't really seem necessary since this code makes it pretty easy to finish the level. If you don't see anyone bouncing back up and the game is still playing, that means you are too far behind and can speed up a little until you see one of the characters.

The Flintstones (Ocean)(Prototype) Genesis/MD

AK1A-CA3C
On level 2, Bamm-Bamm, Pebbles, or Dino will always bounce back up from anywhere above or in front of your car. Even if your car is way behind them (on the left side of the screen), they will still bounce back up. The only way they will fall and die, is if your car is in front of them.

Hey Tony!

I have some GG code ideas for the Genesis Mortal Kombat rev1 ROM:

-Make the Blood code active by default.
-Make the throw movement back to the Low Punch button instead of the High Kick button (WTF)
-Make a code to change the Characters position to 1 tile (8px) higher in the Arenas (except of The Pit).

Thank you!

Thanks for the info and the code, Tony :) Code works as described and I was able to get to the end, at least I think I do. I really hope a (more) complete proto will be uncovered some day.

GelmiR, as you said, that was probably the end of the level, but hard to tell.

LinkueiBR, may take a look at those later.

Terminator 2: Judgment Day (Genesis/MD)

DD5A-AA42
Always have the pistol (A button), even at the very beginning of the game.

AM5A-BA60 +
AM5A-AA62 +
DAGA-CA68
Always have the M-16 machine gun (B button) with infinite ammo, even at the very beginning of the game.

AH5A-BA60 +
AM5A-AA62 +
DAGA-CA68
Always have the Rotary Cannon (B button) with infinite ammo, even at the very beginning of the game.

Yay, looking forward to testing those T2 codes :) I'll do it tomorrow and will get back to you. I can already tell you that they are useful in combination with "start at a certain level" codes, as they'd always start you with no weapons. Only weapon left is the shotgun, I think you covered all the others. Will get back to you!

Tested the T2 codes. First up was the "always start with pistol", wanted to test how level 1 would react to that. But the game doesn't freak when picking up the pistol where you are supposed to, nor does it register that you already have it - objective to find weapons remains.

As for the other codes, I can see why they don't work with the single unlimited ammo code I already had :) But these work great! Also you can switch between all the weapons during gameplay by activating/deactivating codes. Thanks Tony!

Glad to hear they work. Thanks for testing and confirming.

An interesting bit of info... there are two different values that the game uses for the M-16, which seems to imply that there are two different versions of the M-16. I compared them and visually they appear identical, so maybe there's a difference in power? Do you know anything about there being two different M-16s? Edit: I used ID number 2 for the M-16 code above, while ID number 3 is the other M-16.

Also, I made a code that lets the Shotgun do rapid fire like the machine gun, but was going to require some extra codes to fix a problem with it, so I didn't pursue it further. Will see if I can get just a regular "Always have Shotgun" code.

You're welcome!

As for the M16, I don't think there's a difference in power with the M-16. The only thing I can think of is maybe it's a different value because it's also found in another level?

From the top of my head, these are the levels, with weapon locations I know of.

Level 1 - The Corral (pistol and shotgun)
Level 2 - John's House
Level 3 - The Mall (M16)
Level 4 - Pescadero Hospital
Level 5 - Enrique's Compound (M16 and 2x mini-gun)
Level 6 - Dyson's House
Level 7 - Cyberdyne
Level 8 - Steel Mill

So there's 2 mini-guns as well, they are in the same level - in fact even in the very same location. Probably in case a player would miss picking it up (you only have a limited time to do so). But the M16 exists in 2 levels, not sure if there are more but I don't think so. Could that have to do with it?

Shotgun with rapid fire? That was cool in T1 :D

Got the Shotgun figured out so that it does automatic burst fire. Pretty fun.

Terminator 2: Judgment Day (Genesis/MD)

AX5A-BA60 +
AM5A-AA62 +
DAGA-CA68
Allows you to always have a special modified version of the Shotgun (B button) with infinite ammo, even at the very beginning of the game. The Shotgun is modified so that if you hold down the B button, the Shotgun will automatically shoot bursts of 4 rounds instead of a single shot.

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Here is the other code for the second M-16 if you felt like experimenting. I may dig deeper into it and see if I can find out why they have separate programing for the two. The Mini-gun only has a single number used in the programing. Here are the ID numbers used in the programing: 01 = Mini-gun, 02 = M-16, 03 = M-16, 04 = Shotgun.

AS5A-BA60 +
AM5A-AA62 +
DAGA-CA68

The first code (AS5A-BA60) is the only one that's different from the first M-16 code above.

EDIT: Here's the code from the first M-16...

AM5A-BA60 +
AM5A-AA62 +
DAGA-CA68
Always have the M-16 machine gun (B button) with infinite ammo, even at the very beginning of the game.

EDIT2: After some testing, this is what I found out.

Looks like the Pistol, both M-16s, and the Mini-gun all do 1 point of damage. I'm assuming that the difference is that the M-16's and Mini-gun have a much higher rate of fire, which causes much more damage. I can't find any difference in the two M-16s.

Made another new code while I was digging around:

AJ6A-CA20
1 shot kills enemies.

Don't know if there are any bosses in this game so don't know if it works on them, but tested it on an enemy in level 6 and seemed to work fine.

Cool, more stuff to try out :) I'll try and do it this evening. Did you see my reply at the bottom of page 135? Other than the M16 being in 2 levels, maybe another explanation is its amount of ammo on pickup? I'd have to compare the one in the Mall and at Enrique's, at this moment I don't know if the have the same amount of ammo on pickup or not.
Thanks for all the info, sounds interesting :) I'll get back to you after testing. As for bosses, the T-1000 pops up a lot in the game. I'll be sure to test it on him.

Tested all the codes, the ones for all the weapons are awesome! I can't figure out the difference between the 2 versions of the M16, either. Both the one in the mall and at Enrique's compound have 300 rounds on pick up. The rapid shotgun is great, too.

I did at one time in level 1 have a problem with the pistol, where I couldn't fire it. Also the game didn't register me picking on up, either - as I saw enemies dropping more of them (and another shotgun too, now that I think about it). But I have not been able to replicate it.
What's funny is that when shooting around when on vertical stairs, the pistol is always used and fires rapidly. I'm not really sure how this works without codes, as I hardly ever use it.

The game froze on me once, at the beginning of the 3rd level (the mall). I insta-reset and saved just before I got back there. But in this case, I have also not yet been able to replicate it.
What is interesting about this to me though, is that the game has never frozen on me before. I do know it is very finicky on real hardware when using Game Genie codes. In fact, most of the times after a few minutes of playing, it would send me to the Debugging Monitor seen here. Though for me, the screen was always fully black with the text appearing in red.

As for the 1 shot kill code, sometimes it works, sometimes it doesn't. It also appeared to work on robots at Cyberdyne, but not on the T-1000. I'll try some more :)

In any case, I will probably do some more testing this weekend. Thanks for all the new codes! :D

Thanks for the info. I'll see if I can figure out if the codes are causing the problems you mentioned. Also, I'll change the code description for the 1 shot kills enemies code. Let me know if you get any more specific info on that.


EDIT: GelmiR, I've got a question about Terminator 2: Judgement Day. Can you have more than one of the better weapons (Shotgun, M-16, or Mini-gun) at once? If so, how do you switch between them?

I think the Pistol (A button) does less damage than the shotgun, M-16 and minigun. The fire rate on the pistol and shotgun are both pretty slow, but you can 1 shot kill a lot of enemies with it, but the pistol takes several shots to do the job.

I did another playthrough without using the weapon codes, but I still had a second pistol show up, so that bit didn't have to do with the new codes. Can't figure out why at one point it didn't fire, though. But it's no big deal - mostly curiosity.

As for your question on having more than one of the better weapons - I wasn't sure. I assumed that from the minigun you'd revert back to the M-16 and then to the shotgun. But no, the weapon that you use with the B button is always replaced with the one you last pick up. So if you pick up an M-16 while you had a minigun, tough break. Though at least there appear to be two of them at Enrique's compound. But with your codes, you can switch around the weapons with activating/deactivating codes :) But in normal gameplay, one B button weapon at a time.

And finally, I figured out why the 1 shot kills code would sometimes work for me, and sometimes it wouldn't. It only works on enemies on the right side of the player, not the left side :) So to fully cover it, I guess another code would be needed? I'll try and finish this playthrough, but I think it works on all enemies except the T-1000.

Edit: Swat also drops M16 frequenty.

Wow, I'm glad you figured out the explanation for the 1 hit kill code. I've never run into that in any other games. I'll make a code that works on the left side.

I was hoping there was a way to have more than one secondary weapon so I could possibly make a code to have all weapons. Thanks for checking.

Is there any need to make a 1 hit kill code for the T-1000? If so, what's the easiest way to get to him?

Me too :) I wasn't really looking for the explanation, I just noticed it near the end of level 1 by accident. It did make me think of the Pirates of Dark Water codes to clip through doors, that needed codes for left and right as well. But yeah, "I've never run into that in any other games" seems pretty common for this game :)

Don't worry about having more secondary weapons, changing is already possible thanks to activating/deactivating the weapon codes you made.

As for the T-1000, no, not really. After you take him down, he pops up again seconds later anyway. But the easiest way to get to him is in level 2.
In level 1, grab the future objects (1 outside, 1 inside), pistol and shotgun, and press up at the 2nd phone booth to get John's address.
After the drive to level 2 (John's house), don't shoot the alarm. Enter the house, you should hear the alarm. You can shoot it now if the sounds annoys you. The T-1000 and the police should arrive soon. As well as bikers outside the house :P

My PC died last night, so will be a bit of a delay before I can get to the other half of the 1 hit kill code. Thanks again for all the help.

You're welcome, and don't worry about it. Sorry to hear about your computer!

Got a new computer, so should be back in business in a couple days.

Good to hear! :)

Terminator 2: Judgment Day (Genesis/MD)

AJ6A-CA40
1 shot kills enemies (left side only). Does not work on the T-1000.

Tested on the first 3 levels, works as described :) I don't have any reason to believe it will stop working in the rest of the levels. Thanks for completing this code!

Fun fact for your set of 4 codes for invincibility, or rather something I'd never thought of trying before. I usually leave John and Sarah somewhere where they can't get hurt, until I need them. They get hurt easily, and I figured invincibility for them would take another 4 codes, the way this game is programmed.

In normal gameplay when one of them goes down, they start blinking for a limited amount of time. During this time, you can kneel at their side, and in doing so, replenish some of their health by giving some of yours. Your codes do wonders for healing John and Sarah back to full health as well. It doesn't drain the player health at all and eliminates any need for seperate codes for John and Sarah :)

GelmiR, that's good to know about the inv codes. I remember recently reading that you can give some of your health to other players.

I just bought a new gaming PC and before I even played a single PC game, I installed all of my code making stuff and started making codes. Easy to tell where my priorities are. :-)

Quote:

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Originally Posted by Tony H

I just bought a new gaming PC and before I even played a single PC game, I installed all of my code making stuff and started making codes. Easy to tell where my priorities are. :-)

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It should be at trying some new games :D