G:Super Mario Bros. DX.

T:All GB Color Games Require A Version 2.1+ Cheat Device

C:"Yoshi is Here!" World Modifier|91??10D9|Zapdos|Set this to 00-07 depending on the world. This code MUST be switched off until you get to the "Yoshi is here!" screen, then you can turn it on and see where the Yoshi egg is in the level you picked.
C:"Yoshi is Here!" Stage Modifier|91??11D9|Zapdos|Set to 00-03 depending on the stage. You should also read the World Modifier note (above).
C:Infinite Lives|90097FC1|Zapdos|
C:Have 99 Coins/1 Coin To Get Extra Life|9063F2C1|Zapdos|
C:World/Stage Modifier|90??63C1|Zapdos|As with all codes, this code must be switched OFF while starting the game. Turn the switch ON at the map screen. Also, unlike the &quot;Yoshi is here!&quot; codes, there are not individual codes for World/Stage. So 00=1-1, 01=1-2... 04=2-1 and so on.
C:Always Have Star|9001DBC1|Zapdos|
C:Mario Doesn't Get Hurt|01FFF3C1|urbs323@gateway.net|
C:All Enemies Are Gone|9120D2D2|njb@home.com|Leave the code switch off. Go to a stage and turn the switch on. All bad guys will be gone. But it is in possible to touch the flag, even if you turn the code switch off.
C:All Pictures|01FF29C4<BR>01FF2AC4<BR>01FF2CC4|chris_war@hotmail.com|
C:All Challange Levels|01FF8EC1<BR>01FF8FC1<BR>01FF90C1<BR>01FF91C1|chris_war@hotmail.com|
C:Enable Boo Vs. You|010392C1|Gades|
C:Always Super Mario|0101C5C1|Nick Joslin|
C:Always Have Fire Power|0101CEC1|Nick Joslin|You will notice this effect as soon as you turn the code switch on after you start the game.
C:Get Yoshi Egg|016393C1|Gades|
C:Jump Modifier|01??C7C1|StarTrekML@aol.com|Choose 01 - 04, depending on how high you want Mario & Luigi to be able to jump.
C:Always Be A Ghost|900FD5C1|Anthrax|
C:Slide Instead Of Run|0101C6C1|StarTrekML@aol.com|This code can also be used with Luigi.
C:Walk Through Everything|0102C1C1|Nick Joslin|It should be used with the Always be Super Mario code. If you need to go down a pipe turn off the codes and get hit, you will then be in normal mode. You must turn the codes off before you try to hit a pole or you will get stuck. Also you will need to turn off the codes and get hit by Bowser before you can get the axe. I recommend this code only for levels 8-1 through 8-3. The jumps on these levels are very hard, that is why I made this code.
C:Have All Red Coins In Challenge Mode|911F0AD3|Zapdos|
C:Freeze Timer At 296|01017EC1<br>01287DC1|Nick Joslin|To get the codes to work you must leave the effects switch in the off position until gameplay begins. Then turn the switch on.
C:Score Modifier|01??7CC1|superkirby@usa.net|
C:Character Select|01??83C3|GameDr4|00 - Mario<BR>01 - Luigi
C:Blocks Always White (Blocks Will Look Red, But It's As If They Aren't There)|010075C3|GameDr4|
C:Stop Timer (Variation)|01897DC1|wholtel@shighway.com|
C:Ghost Can't Move|01002DD0|GameDr4|Ghost will go a little off screen then return to original starting point repetitively.
C:No Slide|0118FFC1|Travis Houk|
C:Jump High|015F00C2|Travis Houk|
C:Far Slide|01FFFDC1|Travis Houk|
C:Ghost Mode|0110D5C1|Travis Houk|
C:One Hit Death|0100D5C1|Travis Houk|
C:Freeze Enemies/Powerups/Fileballs|010059D0<br>01005AD0<br>01005BD0<br>01005CD0<br>01005DD0<br>01005ED0<br>01005FD0|Travis Houk|
C:Invincible|0101DBC1|Travis Houk|
C:Shell Stomps 1ups + Enemy Stomp equals 8000 points|010DDEC1|Travis Houk|
C:Fly|0102C1C1|Illminion@aol.com|
C:Stage Modifier|01??EFC1|Bilko87.53@juno.com|
C:Coin Modifier|01??F2C1|Bilko87.53@juno.com|
C:Always Be Small Mario With Fire|0109C1C1|sega45@subdimension.com|
C:Have All Red Coins|011F0AD3|bycharlee@laker.net|
C:Infinite Time|01907DC1|DrShnaps|
C:Color Of Attire Modifier|01??AFC1|DrShnaps|
C:Total Score (Challenge Mode)|01??A3C1<br>01??A2C1<br>01??A1C1|Pika98765|You must know this first: The score is not what it appears to be. 100 is really only 10, for example, and then a 0 is put on the end. So putting 00000A would make 100.
C:10-Coin Boxes Never Run Out|01116CC2|LittleHippo|
C:No Clipping|0102C1C1|LittleHippo|to turn this off, turn off Cheat Device and touch a bad guy.
C:Behind Scenery|0101E3C1|LittleHippo|
C:Stop Time|010081C1|LittleHippo|time stays at 400 and you don't have to turn off Cheat Device at the end of the level.
C:Level Modifier|01??0FD0|LittleHippo|22 Flying fish level<br>2E Lakuta level<br>32 Random Bowser's fireballs<br>36 Random bullets<br>38 Random fish like underwater<br>45 Lots of points continuouslly (annoying)
C:Mario X (Left/Right) Coords|01??A8FF<br>01??A7FF|Pika98765
C:Transparent Mario|017FAFFF|Pika98765
C:Jump Mod|01??ACFF|Pika98765|Values: 00 - Can't Jump, Fall Slower   01~7F - Can't Jump, Fall Faster (Higher Values=Faster)   80~FF - Moon Jump (Must turn off to come down. If Mario/Luigi goes too high he won't come down! Higher Values=Slower. 80 is like a rocket! Try it!)
C:Power-Up Modifier|01??1DD1<br>01??1ED1<br>01??1FD1|Khaos41|Now changing the ?? on just one changes a third of the power ups, so you can miks and match, making the level powerups different!<br>00-Mushroom<br>01-Fire Flower<br>02-Starman<br>03-1Up<br>04-Yoshi Egg (very useful on challenge levels)<br>05-Poison Mushroom<br>06-Weird block that gives you 200 points
C:Fusion|0106C1C1|Randall D|
C:Small Mario With Fire|0109C1C1|Randall D|When you turn on the code mario will be in Diff. colors and when you turn off the code mario will have fire power.
C:Modify Number Of Wins In Boo Vs. You Mode|01??8FC3|GameDr4|
C:Modify Number Of Losses In Boo Vs. You Mode|01??90C3|GameDr4|
C:Cursor X Coord (Calendar)|010?5DD9|Pika98765 (HyperHacker)|
C:Cursor Y Coord (Calendar)|010?5ED9|Pika98765 (HyperHacker)|
C:New Date Icon|010?6ED9|Pika98765 (HyperHacker)|
C:Caption Style (Toads in Toybox)|010?DFC4|Pika98765 (HyperHacker)|
C:"for Super Players" Menu Option (0=new Game, 1=continue)|01??97FF|HyperHacker|
C:Level|01??63C1|HyperHacker|SMB <BR><BR>00-1F Normal Levels <BR>20 Test Level? <BR>21-33 Bonuses and stuff <BR>34+ Repeats <BR><BR>SMB FSP <BR>00-1F Normal Levels <BR>20-33 BETA Hidden Levels* <BR>34 ??? <BR>*These are indeed the hidden levels 9-1 thru D-4 from the original, however they're incomplete and sometimes impossible. Also, strangely, world C is skipped (all the levels are there but the numbers go from B-4 to D-1) thus it ends at E-4. <BR>You have to turn this code on and off at the map and leave it off during the game, or it will bugger up some parts. 
C:You Vs Boo Level|01??6BC3|HyperHacker|
C:Fuggled Coords|01??01C2|HyperHacker|
C:Mario Image|01??03C2|HyperHacker|
C:Music Codes|01??6FC3|christian|62 - Overworld<br>63 - Underworld<br>64 - "Got The Flag"<br>65 - Invincibility And "Up The Vine")<br>66 - Underwater<br>67 - Death<br>68 - Castle<br>69 - Game Over<br>6A - "Saved The Princess"<br>6B - "Beat The Castle" "Got The Ax" <br>6C - Super Stages<br>6D - Album<br>6E - Credits<br>6F - Award<br>70 - Miss<br>71 - "Running Out of Time"<br>72 - "Into The Pipe", Where You Go To Underworld Or Underwater<br>73 - Cards<br>74 - Challenge Clear 1<br>75 - Toy Box<br>76 - Title)<br>77 - "Made The Top 10")<br>78 - Challenge Clear 2<br>79 - Boo, Or Rival In A 2 Player Race Win<br>7A - ????<br>7B - Beat Boo (Or Rival) In A Race<br>7C - "Select Your Race Stage"<br>7D - Game Select<br>7E - Most Race Stages<br>7F - "Toads And Peach"
C:Fall In A Hole (Like You Went In A Pipe - Most Of The Time)|0101E6C1|I(warr1or2@aol.com)christian|Most of the time you will fall in a hole instead of dying. This code might not work underwater.